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Physical activity, isometric strength and body composition of university students

Preto, Leonel; Mendes, Eugénia; Novo, André; Azevedo, Ana
Fonte: Austrian Society of Physical Medicine and Rehabilitation Publicador: Austrian Society of Physical Medicine and Rehabilitation
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
36.41%
The importance of physical activity in promoting health and well-being of the young adult population is evidenced by several epidemiological studies. The increasing incidence in this population of cardiovascular, metabolic and degenerative diseases and obesity has been linked with an epidemic variable, the sedentary behavior, and commonly dubbed the “disease of the century”. Regular physical activity may contribute to the development of muscle strength, improve the quality of soft tissue and bone mass, and decreased body fat. The early inclusion of regular physical activity and other healthy lifestyles tend to be incorporated throughout life with noticeable gains in health and quality of life in adult life. In this study we assessed the physical activity level (PAL), muscle strength (MS) and body composition (BC) of 84 young adults in higher education with the following, assess physical activity; evaluate different manifestations of muscle strength; assess body composition and analyze the relationship between muscle strength, body composition and physical activity in young adults. We drew up a descriptive, correlational and cross-cutting study. To achieve our objective we collected the following data: a) Physical activity: short version of IPAQ (International Physical Activity Questionnaire). b) Muscle strength: hand grip of both hands with Jamar® c) Key pinch strength with digital dynamometer Baseline Hand Dynamometer; ® d) Maximum isometric strength of the quadriceps in seat 45-degree incline leg press machine linked to a strain gauge Ergo Meter – Globus ; ® f) Body composition: bioelectric impedance on Tanita Ironman Body Composition Monitor and appropriated software g) Height: stadiometer Seca A total of 84 university students were subject to this study...

Physical activity, isometric strength and body composition of university students

Mendes, Eugénia; Novo, André; Preto, Leonel; Azevedo, Ana
Fonte: Austrian Society of Physical Medicine and Rehabilitation Publicador: Austrian Society of Physical Medicine and Rehabilitation
Tipo: Conferência ou Objeto de Conferência
ENG
Relevância na Pesquisa
36.41%
The importance of physical activity in promoting health and well-being of the young adult population is evidenced by several epidemiological studies. The increasing incidence in this population of cardiovascular, metabolic and degenerative diseases and obesity has been linked with an epidemic variable, the sedentary behavior, and commonly dubbed the “disease of the century”. Regular physical activity may contribute to the development of muscle strength, improve the quality of soft tissue and bone mass, and decreased body fat. The early inclusion of regular physical activity and other healthy lifestyles tend to be incorporated throughout life with noticeable gains in health and quality of life in adult life. In this study we assessed the physical activity level (PAL), muscle strength (MS) and body composition (BC) of 84 young adults in higher education with the following, assess physical activity; evaluate different manifestations of muscle strength; assess body composition and analyze the relationship between muscle strength, body composition and physical activity in young adults. We drew up a descriptive, correlational and cross-cutting study. To achieve our objective we collected the following data: a) Physical activity: short version of IPAQ (International Physical Activity Questionnaire). b) Muscle strength: hand grip of both hands with Jamar® c) Key pinch strength with digital dynamometer Baseline Hand Dynamometer; ® d) Maximum isometric strength of the quadriceps in seat 45-degree incline leg press machine linked to a strain gauge Ergo Meter – Globus ; ® f) Body composition: bioelectric impedance on Tanita Ironman Body Composition Monitor and appropriated software g) Height: stadiometer Seca A total of 84 university students were subject to this study...

The effect of carbohydrate mouth rinse on maximal strength and strength endurance

Painelli, Vitor de Salles; Roschel, Hamilton; Gualano, Bruno; Del-Favero, Serena; Benatti, Fabiana Braga; Ugrinowitsch, Carlos; Tricoli, Valmor Alberto Augusto; Lancha Junior, Antonio Herbert
Fonte: SPRINGER Publicador: SPRINGER
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.37%
It has been previously reported that carbohydrate (CHO) mouth rinse can improve exercise performance. The proposed mechanism involves increased activation of brain regions believed to be responsible for reward/motivation and motor control. Since strength-related performance is affected by central drive to the muscles, it seems reasonable to hypothesize that the positive CNS response to oral CHO sensing may counteract the inhibitory input from the muscle afferent pathways minimizing the drop in the central drive. The purpose of the current study was to test if CHO mouth rinse affects maximum strength and strength endurance performance. Twelve recreationally strength-trained healthy males (age 24.08 +/- 2.99 years; height 178.09 +/- 6.70 cm; weight 78.67 +/- 8.17 kg) took part in the study. All of the tests were performed in the morning, after an 8 h overnight fasting. Subjects were submitted to a maximum strength test (1-RM) and a strength endurance test (six sets until failure at 70% of 1-RM), in separate days under three different experimental conditions (CHO mouth rinse, placebo-PLA mouth rinse and control-CON) in a randomized crossover design. The CHO mouth rinse (25 ml) occurred before every attempt in the 1-RM test, and before every set in the endurance strength test. Blood glucose and lactate were measured immediately before and 5 min post-tests. There were no significant differences in 1-RM between experimental conditions (CHO 101 +/- 7.2 kg; PLA 101 +/- 7.4 kg; CON 101 +/- 7.2 kg; p = 0.98). Furthermore...

COMPARISON BETWEEN LINEAR AND DAILY UNDULATING PERIODIZED RESISTANCE TRAINING TO INCREASE STRENGTH

PRESTES, Jonato; FROLLINI, Anelena B.; LIMA, Cristiane de; DONATTO, Felipe F.; FOSCHINI, Denis; MARQUETI, Rita de Cassia; FIGUEIRA JR., Aylton; FLECK, Steven J.
Fonte: LIPPINCOTT WILLIAMS & WILKINS Publicador: LIPPINCOTT WILLIAMS & WILKINS
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
36.38%
Prestes, J, Frollini, AB, De Lima, C, Donatto, FF, Foschini, D, de Marqueti, RC, Figueira Jr, A, and Fleck, SJ. Comparison between linear and daily undulating periodized resistance training to increase strength. J Strength Cond Res 23(9): 2437-2442, 2009-To determine the most effective periodization model for strength and hypertrophy is an important step for strength and conditioning professionals. The aim of this study was to compare the effects of linear (LP) and daily undulating periodized (DUP) resistance training on body composition and maximal strength levels. Forty men aged 21.5 +/- 8.3 and with a minimum 1-year strength training experience were assigned to an LP (n = 20) or DUP group (n = 20). Subjects were tested for maximal strength in bench press, leg press 45 degrees, and arm curl (1 repetition maximum [RM]) at baseline (T1), after 8 weeks (T2), and after 12 weeks of training (T3). Increases of 18.2 and 25.08% in bench press 1 RM were observed for LP and DUP groups in T3 compared with T1, respectively (p <= 0.05). In leg press 45 degrees, LP group exhibited an increase of 24.71% and DUP of 40.61% at T3 compared with T1. Additionally, DUP showed an increase of 12.23% at T2 compared with T1 and 25.48% at T3 compared with T2. For the arm curl exercise...

Estudo comparativo de sistemas adesivos de fabricação nacional e importados: resistência de união à dentina, resistência à tração e micromorfologia; Comparative study of national and international adhesive systems: dentin bond strength, tensile strength and SEM

Soares, Fabio Zovico Maxnuck
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 27/09/2007 PT
Relevância na Pesquisa
36.39%
O objetivo deste trabalho foi comparar sistemas adesivos de fabricação nacional - Magic Bond DE (Vigodent), Master Bond (Biodinâmica) e Self Etch Bond (Vigodent) e similares importados - Adper Single Bond 2 (3M/ESPE) e Clearfil SE Bond (Kuraray) por meio da avaliação da resistência de união, resistência à tração e micromorfologia da interface. Para a avaliação da resistência de união foram utilizados vinte e cinco molares humanos hígidos (n=5). Os dentes foram preparados de modo a obterem-se superfícies planas em dentina, sobre as quais os sistemas adesivos foram aplicados seguindo as instruções dos fabricantes. Após 24 horas de armazenamento em água destilada a 37oC os dentes restaurados foram seccionados para obterem-se corpos-de-prova com área aderida de aproximadamente 0,8mm2. Metade dos corpos-de-prova foi submetida imediatamente ao teste de microtração, com velocidade de 0,5 mm/min até o momento da fratura. Os demais corpos de prova foram armazenados por mais 6 meses antes da realização do teste. A resistência à tração foi avaliada em corposde- prova (n=10) usinados em forma de haltere, com secção transversal aproximada de 0,4 mm2. O teste foi realizado em períodos idênticos aos do ensaio de microtração. Para a análise em microscopia eletrônica de varredura dois dentes foram preparados para cada sistema adesivo. Os valores obtidos foram submetidos à análise de variância e teste de correlação de Pearson. Os resultados obtidos no teste de resistência de união mostraram que...

Evolução fisiológica da sensibilidade e da força da mão com o envelhecimento; Physiologic evolution of sensitivity and hand strength with aging

Silva, Silmara Nicolau Pedro da
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 08/02/2013 PT
Relevância na Pesquisa
36.37%
Introdução: Os estudos, a respeito das condições de sensibilidade e força ao longo da vida, ainda são escassos, principalmente os que abordam vários aspectos da sensibilidade como sensibilidade à pressão, vibratória, dolorosa e da força de pinça e preensão. Algumas pesquisas apontam para a redução da força muscular com o avanço da idade, mas desconhecem o seu comportamento, magnitude e os hábitos de vida que podem influenciar nessa evolução. Objetivo: Analisar, através de testes específicos, a evolução da sensibilidade e da força manual em grupo de voluntários saudáveis nas diferentes idades acima de 20 anos e investigar a influência de alguns hábitos de vida. Casuística e Métodos: A força e a sensibilidade das mãos foram avaliadas em um estudo seccional em 116 voluntários humanos. Realizamos testes específicos de sensibilidade e de força em um grupo de voluntários saudáveis acima de 20 anos, compreendida entre 21 e 96 anos de idade. A pesquisa foi desenvolvida entre 2006 e 2010 e avaliou 70 mulheres e 46 homens. Foram aplicados testes de avaliação bimanual das forças de pinça e preensão (dinamômetros B&L Pinch-Gauge® e Jamar®), sensibilidades ao toque (Monofilamentos de Semmes-Weinstein)...

Influencia do tamanho da cavidade, tecnica de fotoativação e sistema restaurador sobre a adaptação marginal, dureza knoop e resistencia de união a dentina radicular; Influence of the cavity size, photoactivation method and restorative system on marginal adaptation, knoop hardness and bond strength to root dentin

Americo Bortolazzo Correr
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 10/02/2009 PT
Relevância na Pesquisa
36.38%
O objetivo deste estudo foi verificar a influência do volume de compósito, técnica de fotoativação e sistema restaurador sobre a adaptação marginal, dureza Knoop e resistência de união de compósitos à dentina humana radicular. Este estudo foi dividido em 2 Capítulos. O Capítulo I verificou o efeito do volume de compósito (mantendo-se o mesmo fator C) e sistema restaurador sobre a adaptação marginal, dureza Knoop e resistência de união "push-out" a dentina radicular. Foram utilizados 90 pré-molares hígidos divididos em 9 grupos (n=10), de acordo com o volume de compósito (pequena, média e grande) e sistema restaurador (Filtek Z350, Filtek Z350 Flow e Filtek LS). Os compósitos foram fotoativados por LED Ultralume 5 (Ultradent) por 20 s para Filtek Z350, Filtek Z350 Flow e 40 s para Filtek LS. A adaptação marginal foi avaliada após 24h utilizando o método do corante superficial, medindo-se a porcentagem corada em relação ao perímetro da cavidade (Caries Detector). Após a análise da adaptação marginal, as amostras foram submetidas ao ensaio de resistência de união "push-out" e de dureza Knoop na superfície do compósito. Os dados foram submetidos à análise de variância dois fatores e teste de Tukey (p=0...

Sistemas adesivos universais : resistência de união ao esmalte e dentina, padrão de fratura e análise ultramorfológica = Universal adhesive systems: bond strength to enamel and dentin, failure pattern and ultramorphology analysis; Universal adhesive systems : bond strength to enamel and dentin, failure pattern and ultramorphology analysis

Paulo Moreira Vermelho
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 17/07/2015 PT
Relevância na Pesquisa
36.37%
Os objetivos deste estudo foram analisar as características ultramorfológicas da interface de união dente-resina, a resistência de união ao esmalte e dentina pelo método da microtração e os padrões de fratura dos espécimes testados. Dois adesivos "universais ou multi-molde" (Scotchbond Universal, 3M ESPE e All-Bond Universal, Bisco) foram testados nos modos autocondicionantes e com condicionamento prévio e comparados aos métodos tradicionais de união ao esmalte e dentina (grupos controles) utilizando os adesivos Optibond FL (Kerr) e Clearfil SE Bond (Kuraray Noritake). Esmalte e dentina de terceiros molares humanos foram utilizados nos procedimentos adesivos, os quais foram realizados com as instruções dos fabricantes. Após a aplicação dos adesivos, um bloco de compósito foi construído em incrementos. Os dentes foram seccionados longitudinalmente para obtenção de espécimes em formato de "palitos" para o ensaio de resistência de união por microtração (n=8) e as análises em microscopia eletrônica de transmissão (MET) (n=2). Os espécimes foram testados após 24 horas ou um ano de armazenamento em saliva artificial. Para a MET, solução traçadora de nitrato de prata foi utilizada para mostrar espaços nanométricos e evidências de degradação na área de união. As superfícies fraturadas dos espécimes foram observadas em microscopia eletrônica de varredura e os dados de resistência de união analisadas pela ANOVA três-fatores...

Muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty

Ciolac,Emmanuel Gomes; Greve,Júlia Maria D’Andréa
Fonte: Faculdade de Medicina / USP Publicador: Faculdade de Medicina / USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2011 EN
Relevância na Pesquisa
36.37%
OBJECTIVES: To analyze muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty. METHODS: Twenty-three community-dwelling women were divided into the following groups: older, with knee osteoarthritis and total knee arthroplasty in the contralateral limb (OKG; N= 7); older, without symptomatic osteoarthritis (OG; N= 8); and young and healthy (YG; N= 8). Muscle strength (1-repetition maximum strength test) and exercise intensity progression (workload increases of 5%-10% were made whenever adaptation occurred) were compared before and after 13 weeks of a twice-weekly progressive resistance-training program. RESULTS: At baseline, OKG subjects displayed lower muscle strength than those in both the OG and YG. Among OKG subjects, baseline muscle strength was lower in the osteoarthritic leg than in the total arthroplasty leg. Muscle strength improved significantly during follow-up in all groups; however, greater increases were observed in the osteoarthritic leg than in the total knee arthroplasty leg in OKG subjects. Greater increases were also seen in the osteoarthritic leg of OKG than in OG and YG. The greater muscle strength increase in the osteoarthritic leg reduced the interleg difference in muscle strength in OKG subjects...

Força muscular do assoalho pélvico em mulheres submetidas ao parto vaginal, à cesárea e nulíparas; Pelvic floor muscle strength in women undergoing vaginal delivery, cesarean section and nulliparous

BATISTA, Elicéia Marcia
Fonte: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciências da Saúde; Ciências da Saúde - Medicina Publicador: Universidade Federal de Goiás; BR; UFG; Mestrado em Ciências da Saúde; Ciências da Saúde - Medicina
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
36.38%
Childbirth may determine pelvic floor modifications that may cause dysfunctions such as urinary/fecal incontinence and pelvic organ prolapse. Furthermore, delivery may be associated with a decrease in pelvic floor muscle (PFM) strength. Objectives: to compare PFM strength in women who delivered vaginally or by cesarean section and nulliparae, investigate the factors associated with PFM strength and demonstrate a correlation between measurements of PFM strength obtained by vaginal digital examination and by perineometer. Methods: a cross-sectional study was conducted, including 31 women following vaginal delivery, 30 following cesarean section and 30 nulliparae. PFM strength was investigated by vaginal digital examination (modified Oxford grading system) and by perineometer. Multiple linear regression analysis with adjustment for covariables was used to compare the mean PFM strength and identify factors associated with PFM strength. The Kendall test was applied to investigate the correlation between vaginal digital examination and a perineometer. Results: the mean age of the participants who delivered vaginally, underwent cesarean section and those who were nulliparous was 32.3±5.8 years, 30.5±5.4 years and 27.2±5.9 years (p<0.01)...

Influência da terapia endodôntica e do envelhecimento artificial acelerado na resistência de união de pinos de fibra de vidro à dentina intrarradicular; Influence of endodontic therapy and artificial accelerated aging on fibreglass post bond strength to intraradicular dentine

Santana, Fernanda Ribeiro
Fonte: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciências da Saúde (FM); Faculdade de Medicina - FM (RG) Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciências da Saúde (FM); Faculdade de Medicina - FM (RG)
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
36.37%
Aim: To evaluate in vitro the influence of root canal instrumentation techniques, endodontic irrigants, endodontic sealers and artificial accelerated aging on fibreglass post bond strength to bovine intraradicular dentine. Methodology: Part 1. 120 bovine incisors were divided into 12 experimental groups (n=10) resulting from the interaction among 3 study factors: root canal instrumentation technique (RCPSS- root canal preparation with stainless steel instruments - KFile; RCPNiTi- root canal preparation with K3 Nickel-Titanium instruments), endodontic irrigant (NaOCl- 1% sodium hypochlorite; CHX- 2% chlorhexidine; O3- 1.2% ozonated water) (in all samples 17% EDTA was used to remove the smear layer) and specimens artificial accelerated aging (Immediate, test with no aging; Mediate, test performed after 2 months of water storage at 37°C). After root canal preparation, endodontic filling was not performed. Fibreglass posts were cemented with self-adhesive resin cement (RelyX U100, 3M-ESPE) and roots were cross-sectioned to obtain two slices of each third. Samples were submitted to micropush-out test and bond strength values (MPa) were analyzed by ANOVA in a split-plot arrangement and Tukey’s test (α = 0.05). Failure modes were evaluated under a confocal microscope. Part 2. 60 bovine incisors were divided into 6 experimental groups (n=10) resulting from the interaction between 2 study factors: endodontic sealer (Sx- Sealapex; S26- Sealer 26; AHAH Plus) and specimens artificial accelerated aging (Immediate...

The effect of strength training on body composition in distance runners

Beattie, Kris; Lyons, Mark; Carson, Brian P; Kenny, Ian
Fonte: Physical Education and Sport Sciences, University of Limerick Publicador: Physical Education and Sport Sciences, University of Limerick
Tipo: info:eu-repo/semantics/conferenceObject; all_ul_research; ul_published_reviewed
ENG
Relevância na Pesquisa
36.42%
peer-reviewed; Introduction Strength training can improve neuromuscular function in athletes (Zatsiorky, 1995). Previous literature has demonstrated that strength training can improve key performance indicators (i.e. economy, velocity at VO2 max, & anaerobic power/capacity) in competitive distance runners (Beattie et al., 2014). However, the practice of strength training in distance runners is still a novel training modality. Traditionally, for unknown reasons, distance runners have been cautious to strength train. One potential reason is that athletes and coaches are unaware of the neural adaptations of strength training (musculotendinous stiffness, motor unit recruitment and synchronisation, rate coding, intra- and inter-muscular coordination, and neural inhibition), and deliberate that strength training results solely in increased muscle mass, negatively effecting relative aerobic power and performance. The purpose of this study was to examine the effect of a 40 week strength intervention on body composition variables (mass, % body fat, overall-lean & leg-lean muscle) in competitive distance runners. Methodology Twenty competitive club-standard distance runners (n = 20; 28.2 ± 8.6 years; 71.6 ± 6.6 kg; 180.1 ± 6.8 cm) participated in the 40 week study. Participants were divided into two groups based on their personal preference. The two groups consisted of a ‘strength’ intervention group (ST; n = 11; 29.5 ± 10.0 years; 72.8 ± 6.6 kg; 182.8 ± 8 cm)...

Evaluating the effect of arm dominance on the wrist flexor muscle group thickness and strength, using ultrasound and hand-held dynamometry in college badminton players

Hehir, Damien
Fonte: Department of Physiotherapy, University of Limerick Publicador: Department of Physiotherapy, University of Limerick
Tipo: Bachelor thesis; all_ul_research; ul_theses_dissertations; none
ENG
Relevância na Pesquisa
36.37%
non-peer-reviewed; Background: The wrist flexor muscle group is an important muscle group in the execution of a variety of different badminton shots, the strength of which is imperative for a badminton player to regain following injury. Objective: To evaluate the difference in wrist flexor muscle thickness and strength in the dominant vs non-dominant forearms of college badminton players. Methods: Bilateral scans were taken using a Philips, B-mode Aquila ultrasound machine in an effort to detect the difference in wrist flexor muscle thickness in 20 healthy subjects. Bilateral strength measurements were also taken using a J-tech Hand-Held Dynamometer to assess difference in dominant and non-dominant strength. Results: There were statistically significant differences when dominant and non-dominant strength and dominant and non-dominant size were compared with p-values of 0.034 and 0.006 respectively with p set at <0.05 for significance. There were mean percentage differences of statistical significance favouring the dominant forearm in relation to size and strength with strength being 10.50% greater and size being 12.40% greater on the dominant side. No such strength was seen in the correlations between dominant size and strength and non-dominant size and strength as both had r-values of 0.113 and 0.010 respectively with 1 being perfect correlation. Conclusions: This study has demonstrated statistically significant differences dominant and non-dominant strength of the wrist flexor muscle group following the application of non-parametric tests.

Motor unit synchronization measured by cross-correlation is not influenced by short-term strength training of a hand muscle

Kidgell, D.; Sale, M.; Semmler, J.
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
Publicado em //2006 EN
Relevância na Pesquisa
36.37%
The purpose of the study was to quantify the strength of motor unit synchronization and coherence from pairs of concurrently active motor units before and after short-term (4–8 weeks) strength training of the left first dorsal interosseous (FDI) muscle. Five subjects (age 24.8 ± 4.3 years) performed a training protocol three times/week that consisted of six sets of ten maximal isometric index finger abductions, whereas three subjects (age 27.3 ± 6.7 years) acted as controls. Motor unit activity was recorded from pairs of intramuscular electrodes in the FDI muscle with two separate motor unit recording sessions obtained before and after strength training (trained group) or after 4 weeks of normal daily activities that did not involve training (control group). The training intervention resulted in a 54% (45.2 ± 8.3 to 69.5 ± 13.8 N, P = 0.001) increase in maximal index finger abduction force, whereas there was no change in strength in the control group. A total of 163 motor unit pairs (198 single motor units) were examined in both subject groups, with 52 motor unit pairs obtained from 10 recording sessions before training and 51 motor unit pairs from 10 recording sessions after training. Using the cross-correlation procedure, there was no change in the strength of motor unit synchronization following strength training (common input strength index; 0.71 ± 0.41 to 0.67 ± 0.43 pulses/s). Furthermore...

Vertebral body bone strength: the contribution of individual trabecular element morphology

Parkinson, I.; Badiei, A.; Stauber, M.; Codrington, J.; Muller, R.; Fazzalari, N.
Fonte: Springer London Ltd Publicador: Springer London Ltd
Tipo: Artigo de Revista Científica
Publicado em //2012 EN
Relevância na Pesquisa
36.38%
SUMMARY: Although the amount of bone explains the largest amount of variability in bone strength, there is still a significant proportion unaccounted for. The morphology of individual bone trabeculae explains a further proportion of the variability in bone strength and bone elements that contribute to bone strength depending on the direction of loading. INTRODUCTION: Micro-CT imaging enables measurement of bone microarchitecture and subsequently mechanical strength of the same sample. It is possible using micro-CT data to perform morphometric analysis on individual rod and plate bone trabeculae using a volumetric spatial decomposition algorithm and hence determine their contribution to bone strength. METHODS: Twelve pairs of vertebral bodies (T12/L1 or L4/L5) were harvested from human cadavers, and bone cubes (10 × 10 × 10 mm) were obtained. After micro-CT imaging, a volumetric spatial decomposition algorithm was applied, and measures of individual trabecular elements were obtained. Bone strength was measured in compression, where one bone specimen from each vertebral segment was tested supero-inferiorly (SI) and the paired specimen was tested antero-posteriorly (AP). RESULTS: Bone volume fraction was the strongest individual determinant of SI strength (r(2) = 0.77...

Assessment of grip strength with the modified sphygmomanometer test: association between upper limb global strength and motor function

Martins,Júlia C.; Aguiar,Larissa T.; Lara,Eliza M.; Teixeira-Salmela,Luci F.; Faria,Christina D. C. M.
Fonte: Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia Publicador: Associação Brasileira de Pesquisa e Pós-Graduação em Fisioterapia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2015 EN
Relevância na Pesquisa
36.4%
ABSTRACTBackground:Grip strength, commonly evaluated with the handgrip dynamometer, is a good indicator of upper limb (UL) function in stroke subjects and may reflect the global strength deficits of the whole paretic UL. The Modified Sphygmomanometer Test (MST) also provides objective and adequate measures at low-cost.Objective: To assess whether grip strength values obtained by using the MST and those obtained by using a handgrip dynamometer would present similar correlations with the global strength and motor function of the paretic UL in subjects with stroke, both in the subacute and chronic phases.Method: Measures of grip strength (MST and handgrip dynamometer), UL global strength (MST and hand-held dynamometer), and UL motor function (Fugl-Meyer motor assessment scale) were obtained with 33 subacute and 44 chronic stroke subjects. Pearson and Spearman correlation coefficients were calculated and Stepwise multiple regression analyses were performed to investigate predictor variables of grip strength (α=0.05).Results: Significant correlations of similar magnitude were found between measures of global strength of the paretic UL and grip strength assessed with both the MST (0.66≤r≤0.78) and handgrip dynamometer (0.66≤r≤0.78) and between UL motor function and grip strength assessed with both the MST (0.50≤rs≤0.51) and hand-held dynamometer (0.50≤rs≤0.63) in subacute and chronic stroke subjects. Only global strength remained as a significant predictor variable of grip strength for the MST (0.43≤R2≤0.61) and for the handgrip dynamometer (0.44≤R2≤0.61) for both stroke subgroups.Conclusion: Grip strength assessed with the MST could be used to report paretic UL global strength.

The effect of strength training on performance in endurance athletes.

Beattie, Kris; Kenny, Ian; Lyons, Mark; Carson, Brian P
Fonte: Springer Publicador: Springer
Tipo: info:eu-repo/semantics/article; all_ul_research; ul_published_reviewed
ENG
Relevância na Pesquisa
36.37%
peer-reviewed; BACKGROUND: Economy, velocity/power at maximal oxygen uptake ([Formula: see text]) and endurance-specific muscle power tests (i.e. maximal anaerobic running velocity; vMART), are now thought to be the best performance predictors in elite endurance athletes. In addition to cardiovascular function, these key performance indicators are believed to be partly dictated by the neuromuscular system. One technique to improve neuromuscular efficiency in athletes is through strength training. OBJECTIVE: The aim of this systematic review was to search the body of scientific literature for original research investigating the effect of strength training on performance indicators in well-trained endurance athletes-specifically economy, [Formula: see text] and muscle power (vMART). METHODS: A search was performed using the MEDLINE, PubMed, ScienceDirect, SPORTDiscus and Web of Science search engines. Twenty-six studies met the inclusion criteria (athletes had to be trained endurance athletes with ≥6 months endurance training, training ≥6 h per week OR [Formula: see text] ≥50 mL/min/kg, the strength interventions had to be ≥5 weeks in duration, and control groups used). All studies were reviewed using the PEDro scale. RESULTS: The results showed that strength training improved time-trial performance...

Efeito de métodos de avaliação na resistência de união entre cerâmica odontológica e cimentos resinosos = : Effect of mechanical methods of evaluation on the bond strength between dental ceramic and resin cements; Effect of mechanical methods of evaluation on the bond strength between dental ceramic and resin cements

Lucas Costa de Medeiros Dantas
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 06/07/2015 PT
Relevância na Pesquisa
36.37%
Diferentes métodos de ensaio para verificação da resistência de união entre materiais odontológicos são descritos na literatura como meios de predizer o comportamento destes materiais em meio oral. Entre os métodos utilizados, os mais mencionados são os de microtração e microcisalhamento. Apesar de amplamente estudados, existe uma grande variação nos protocolos de confecção de espécimes e de ensaio mecânico, dificultando a comparação entre os estudos. O objetivo neste estudo foi avaliar o comportamento da interface de união entre cerâmica odontológica e dois cimentos resinosos sob influência de diferentes ensaios de resistência de união, potências de fotoativação e realização de ciclagem térmica. Utilizando o método de elementos finitos, no capítulo 1, dois modelos, um simulando o ensaio de microcisalhamento e o outro o ensaio de microtração, foram analisados quanto à distribuição de tensões na região de união dos espécimes. Assim, no capítulo 2, o ensaio de microcisalhamento foi utilizado para avaliar a resistência de união entre dois cimentos resinosos e uma cerâmica odontológica variando a potência do aparelho fotoativador, e a simulação de envelhecimento por meio de ciclagem térmica. Por meio de teste in vitro...

Avaliação da massa e força muscular em pacientes no pré e pós-transplante cardíaco; Evaluation of muscle mass and strength in patients in the pre and post heart transplant

Fernandes, Lenise Castelo Branco Camurça
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 15/09/2015 PT
Relevância na Pesquisa
36.42%
INTRODUÇÃO: Existem poucos estudos demonstrando que anormalidades musculares esqueléticas em pacientes com insuficiência cardíaca crônica persistem meses após o transplante cardíaco. No presente estudo, objetivamos avaliar massa muscular, e força muscular periférica e respiratória em pacientes no pré-transplante cardíaco, e no seguimento precoce (6 meses) e tardio (1,5 e 3 anos) pós-transplante cardíaco. Objetivamos verificar ainda a correlação entre força muscular periférica e respiratória em pacientes no pré e pós-transplante cardíaco. Comparamos, por fim, os dados de pacientes do pré-transplante cardíaco com um grupo controle de indivíduos saudáveis sem doença cardíaca. MÉTODOS: Tratou-se de estudo prospectivo do tipo coorte. Foram selecionados todos os pacientes em lista de espera para transplante cardíaco do Hospital de Messejana, do período de agosto de 2011 a março de 2013. Avaliamos idade, gênero, causas da insuficiência cardíaca, hipertensão, diabetes, tempo de espera na lista, tempo de internamento pós-transplante, tempo de ventilação mecânica, medida da força muscular respiratória, da força muscular periférica, da espessura do adutor do polegar, média bilateral da área de secção transversal do músculo psoas maior...

Muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty

Ciolac, Emmanuel Gomes; Greve, Júlia Maria D’Andréa
Fonte: Universidade de São Paulo. Faculdade de Medicina Publicador: Universidade de São Paulo. Faculdade de Medicina
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; ; Formato: application/pdf
Publicado em 01/01/2011 ENG
Relevância na Pesquisa
36.37%
OBJECTIVES: To analyze muscle strength and exercise intensity adaptation to resistance training in older women with knee osteoarthritis and total knee arthroplasty. METHODS: Twenty-three community-dwelling women were divided into the following groups: older, with knee osteoarthritis and total knee arthroplasty in the contralateral limb (OKG; N= 7); older, without symptomatic osteoarthritis (OG; N= 8); and young and healthy (YG; N= 8). Muscle strength (1-repetition maximum strength test) and exercise intensity progression (workload increases of 5%-10% were made whenever adaptation occurred) were compared before and after 13 weeks of a twice-weekly progressive resistance-training program. RESULTS: At baseline, OKG subjects displayed lower muscle strength than those in both the OG and YG. Among OKG subjects, baseline muscle strength was lower in the osteoarthritic leg than in the total arthroplasty leg. Muscle strength improved significantly during follow-up in all groups; however, greater increases were observed in the osteoarthritic leg than in the total knee arthroplasty leg in OKG subjects. Greater increases were also seen in the osteoarthritic leg of OKG than in OG and YG. The greater muscle strength increase in the osteoarthritic leg reduced the interleg difference in muscle strength in OKG subjects...