The purpose of this study was to
analyze the relationships between musical cadence and the
physiologic adaptations to basic head-out aquatic exercises.
Fifteen young and clinically healthy women performed, immersed
to the breast, a cardiovascular aquatic exercise called
the ‘‘rocking horse.’’ The study design included an intermittent
and progressive protocol starting at a 90 b min21 rhythm and
increasing every 6 minutes, by 15 b min21, up to 195 b min21 or
exhaustion. The rating of perceived effort (RPE) at the maximal
heart rate achieved during each bout (HRmax), the percentage
of the maximal theoretical heart rate estimated (%HRmax), and
the blood lactate concentration ([La-]) were evaluated. The
musical cadence was also calculated at 4 mmol L21 of blood
lactate (R4), the RPE at R4 (RPE@R4), the HR at R4 (HR@R4),
and the %HRmax at R4 (%HRmax@R4). Strong relationships
were verified between the musical cadence and the RPE
(R2 = 0.85; p , 0.01), the HRmax (R2 = 0.66; p , 0.01), the
%HRmax (R2 = 0.61; p , 0.01), and the [La-] (R2 = 0.54;
p , 0.01). The R4 was 148.13 6 17.53 b min21, the RPE@R4
was 14.53 6 2.53, the HR@R4 was 169.33 6 12.06 b min21,
and the %HRmax@R4 was 85.53 6 5.72%. The main conclusion
is that increasing musical cadence created an increase
in the physiologic response. Therefore...
The aim of this study was to analyze the relationships between musical cadence and kinematical characteristics of a basic head-out aquatic exercise. Six young women with at least one year of experience conducting head-out aquatic classes were videotaped in the sagital plane with a pair of cameras providing a dual projection from both above and underwater performing 5 incremental bouts (120, 135, 150, 165 and 180 b.min-1) of the basic head-out aquatic exercise “rocking horse”. There was a decrease of the cycle period throughout the protocol. Relationships between horizontal or vertical displacements with music cadence were not significant. Increased cadence imposed increased segmental and centre of mass’ velocities. As a conclusion expert and fit subjects seem to increase segmental velocity with increasing musical cadence.
Background: Head-out aquatic exercises became one of the most popular physical activities within the health primarily and thirdly prevention system. Music is seen as one of the most important aspects when conducting head-out aquatic exercise sessions. Research question: Is there any relationship between musical cadence and the kinematic behaviour when performing aerobic head-out aquatic exercises? It was hypothesized that an increase in music cadence will would impose a decrease of the segment range of motion. Type of study: Experimental, prospective. Methods: Six young and clinically healthy women with at least one year of experience conducting head-out aquatic classes were videotaped in the frontal plane, with a pair of cameras providing a double projection (above and below the water surface). Subjects performed an incremental protocol of five bouts (120b.min-1, 135b.min-1, 150b.min-1, 165b.min-1 and 180b.min-1) with 16 full cycles of the “side kick” exercise. Data processing and calculation of segmental (i.e. hands and feet) and anatomical landmark (i.e. centre of mass) were performed using the software Ariel Performance Analysis System and applying the DLT algorithm. Results: There was a decrease in the cycle period during the incremental protocol. The relationships between the segmental lateral and vertical displacements with the musical cadence were not significant. The segmental velocities on the lateral and vertical components showed significant increases throughout the incremental protocol. Conclusions: The data suggest that segmental velocity increases with increasing cadence...
The purpose of this study was to compare the physiological
adaptations to basic head-out aquatic exercises with different
levels of body immersion. Sixteen young and clinically
healthy subjects (9 women and 7 men) volunteered to participate
in this study. Each subject performed 3 repetitions (on land, immersed
to the hip, and immersed to the breast) of the aquatic
exercise ‘‘rocking horse’’ for 6 minutes. The rating of perceived
effort (RPE), the maximal heart rate achieved during the exercitation
(HRmax), the percentage of the maximal theoretical
heart rate estimated (%HRmax), the peak of oxygen uptake during
the exercise (V˙ O2peak), and the energy expenditure (EE)
were evaluated. The RPE was significantly higher when exercising
immersed to the hip than on land ( p 0.01) and immersed
to the breast ( p 0.03). The HRmax and %HRmax were
significantly lower when exercising with immersion to the breast
than on land ( p 0.01) and with immersion to the hip ( p
0.01). The V˙ O2peak was significantly different between all conditions.
The lower mean value was verified when exercising immersed
to the breast, followed by immersion to the hip and on
land. The EE was significantly higher when performing aquatic
exercises on land than when immersed to the hip ( p 0.02) and
the breast ( p 0.01). So...
Fonte: Centro de Investigação em Desporto, Saúde e Desenvolvimento HumanoPublicador: Centro de Investigação em Desporto, Saúde e Desenvolvimento Humano
Tipo: Conferência ou Objeto de Conferência
Relevância na Pesquisa
Massive research has been produced
throughout the last decades in order to better
understand the role of head-out aquatic
exercises in populations’ health (Barbosa et
al, 2009). Indeed, such studies aimed to
characterize the physiological acute and/or
chronic response of subjects performing
head-out aquatic exercises.
Introdução: Nos últimos anos a Hidroginástica tem sofrido um aumento significativo no número de praticantes, sendo hoje em dia uma das actividades físicas com maior espectro de idades entre os praticantes que procuram entre outros, uma melhoria da condição física. É no entanto não raramente conotada pela população mais jovem como sendo uma aula para populações idosas, que não podendo fazer parte de uma outra actividade física com uma maior intensidade, optam pela Hidroginástica. Para mudar esta mentalidade é necessário que o professor não só conheça as populações com quem trabalha mas também os níveis de intensidade que pode aplicar a cada uma delas, e como controlar esses níveis de modo a não correrem o risco de sistematicamente promoverem intensidades abaixo da capacidade de muitos praticantes.
Objectivo: Aferir a influência do grupo etário nas respostas fisiológicas, durante a execução do exercício básico de Hidroginástica “Cavalo Marinho” com aumentos progressivos da cadência.
Métodos: Foram submetidos a um protocolo de incremento progressivo da cadência musical de 15 bpm enquanto realizavam o exercício básico de Hidroginástica “cavalo marinho” 37 indivíduos. Estes estavam divididos estavam separados em dois grupos amostrais...
Macrobenthic invertebrates are important indicators of water quality in many aquatic systems, but accurately identifying these organisms is a challenge, particularly for citizen scientists, due to insufficient funding for training programs and events and a dwindling pool of training personnel. Accurately identifying these organisms is key to the accuracy of the models used to generate the water quality assessments. To help address these issues, this project has developed an interactive online photographic key for macrobenthic invertebrates, designed to improve classification accuracy with minimal training for use by citizen scientists. The online digital photographic field guide was created and tested against a widely used paper key (the Izaac Walton key). Classification exercises and user satisfaction surveys were conducted at different events over two years in order to compare the two identification methods. Results indicate that most participants preferred the online field guide, but that the digital field guide did not necessarily increase classification accuracy within all user groups. The results suggest the need for some basic experience or training in using macrobethic invertebrates for water quality assessment, similar to what high school or college students receive in aquatic ecology or field science courses.
Another obstacle to improve water quality assessment is the dissemination of data. A tool currently being developed as part of this project is a digital map and linked database created using ArcGIS 10. This map incorporates spatial data helpful for water quality analyses (e.g. land use/cover) from different sources and has web-enabled links to other water quality databases through hyperlinks built into the map features. This will help account for multiple variables that can affect water quality and to help scientists with outreach...
Costa, Georgina; Instituto Politécnico de Bragança, Departamento de Ciências do Desporto. Bragança, Portugal; Afonso, Sandra; Instituto Politécnico de Bragança, Departamento de Ciências do Desporto. Bragança, Portugal; Bragada, José Augusto; Univ
Fonte: Universidade Federal de Santa Catarina. Florianópolis, SC. BrasilPublicador: Universidade Federal de Santa Catarina. Florianópolis, SC. Brasil
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; "Avaliado por Pares",; ; Avaliado por Pares; Pesquisa originalFormato: application/pdf; application/pdf
Foi objectivo do estudo comparar as adaptações fisiológicas agudas de variantes do mesmo exercício básico de Hidroginástica (acção exclusiva dos membros inferiores, acção simultânea dos membros inferiores e dos membros superiores, acção simultânea dos membros inferiores e dos membros superiores usando halteres flutuantes). Foram estudados 16 sujeito do sexo feminino, jovens, clinicamente saudáveis e com um nível de actividade física regular. Cada sujeito realizou, um exercício básico de Hidroginástica designado de “Cavalo-marinho”. Antes e após cada execução de 6 minutos do exercício foi avaliada a percepção subjectiva de esforço (RPE) e a lactatemia ([La-]). Antes, durante e após cada execução foi avaliada a frequência cardíaca máxima atingida durante a exercitação (FCmax) e estimada a percentagem de frequência cardíaca máxima teórica atingida durante a exercitação (%FCmax). Os sujeitos percepcionaram um aumento significativo da RPE passando da exercitação exclusiva da acção dos membros inferiores...