Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration
Autor(a) principal: | |
---|---|
Data de Publicação: | 2008 |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Motriz (Online) |
Texto Completo: | https://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/1137 |
Resumo: | The critical power model has been applied to many sports which are continuously (e.g., run and swim) and intermittently (e.g., run) performed. However, there is no study applying critical power model to intermittent vertical jump exercise. Then, this study aimed to verify whether critical power model fits to countermovement jumps (CMJs) performed with different passive rest period lengths between jumps. Ten males performed four experimental sessions across different days. The 1st, 2nd and 3rd sessions (S1, S2 e S3) were performed in order to determine the critical interval. They consisted of performing intermittent CMJs (likewise volleyball block) on the force platform, manipulating the rest period lengths (from 4 to 7 s), until exhaustion. Three consecutive failures to reach the target height (i.e., 95% maximal jump height) were considered exhaustion. The concentric impulse, determined through vertical ground reaction force integration with time, was estimated for each CMJ. Thus, the sum of concentric impulses was determined for every experimental session. It was assumed that such a sum represented the total external work to elevate the center of mass during the CMJs. Then, the linear work-time mathematical equation was used to estimate the critical interval. It was hypothesized that critical interval represents the smallest rest period length between CMJs allowing long-term exercise. In order to test such hypothesis, in the 4th experimental session (SCI), the subjects performed CMJs until exhaustion using the critical interval. During all experimental sessions, the number of CMJs and exercise duration (time from the first to last jump) were determined. The number of CMJs performed during S2 (70 ± 28 jumps), S3 (105 ± 28 jumps) e SCI (171 ± 51 jumps) were significantly higher than S1 (42 ± 14 jumps). In addition, the number of CMJs performed during S3 and SCI were significantly higher than S2, while SCI was higher than S3. Regarding exercise duration (S1=171 ± 52 s; S2=346 ± 117 s; S3=610 ± 129 s and SCI=1304 ± 339 s) and sum of concentric impulses (S1=10,297 ± 3,508 N•s; S2=17,077 ± 6,386 N•s; S3=25,883 ± 7,188 N•s and SCI=45,377 ± 14,608 N•s) variables, the significant differences were similar to the responses obtained by number of CMJs for every experimental sessions. Moreover, there was high coefficient of determination (R2 = 0.99 ± 0.01) between the sum of concentric impulses and exercise durations used to estimate the critical interval (7.4 ± 1.3 s). Therefore, the critical power model can be applied to estimate the critical interval in vertical jump exercise, being critical interval the smallest rest period length between CMJs which allows long-term exercise. |
id |
UNESP-17_0b7994216cf201b00504f3d968bc2718 |
---|---|
oai_identifier_str |
oai:periodicos.rc.biblioteca.unesp.br:article/1137 |
network_acronym_str |
UNESP-17 |
network_name_str |
Motriz (Online) |
repository_id_str |
|
spelling |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise durationEfeito da duração do intervalo entre saltos verticais: relação entre impulso concêntrico e duração do exercícioPotência Crítica. Exercício intermitente. Exaustão. Salto com contra movimento.The critical power model has been applied to many sports which are continuously (e.g., run and swim) and intermittently (e.g., run) performed. However, there is no study applying critical power model to intermittent vertical jump exercise. Then, this study aimed to verify whether critical power model fits to countermovement jumps (CMJs) performed with different passive rest period lengths between jumps. Ten males performed four experimental sessions across different days. The 1st, 2nd and 3rd sessions (S1, S2 e S3) were performed in order to determine the critical interval. They consisted of performing intermittent CMJs (likewise volleyball block) on the force platform, manipulating the rest period lengths (from 4 to 7 s), until exhaustion. Three consecutive failures to reach the target height (i.e., 95% maximal jump height) were considered exhaustion. The concentric impulse, determined through vertical ground reaction force integration with time, was estimated for each CMJ. Thus, the sum of concentric impulses was determined for every experimental session. It was assumed that such a sum represented the total external work to elevate the center of mass during the CMJs. Then, the linear work-time mathematical equation was used to estimate the critical interval. It was hypothesized that critical interval represents the smallest rest period length between CMJs allowing long-term exercise. In order to test such hypothesis, in the 4th experimental session (SCI), the subjects performed CMJs until exhaustion using the critical interval. During all experimental sessions, the number of CMJs and exercise duration (time from the first to last jump) were determined. The number of CMJs performed during S2 (70 ± 28 jumps), S3 (105 ± 28 jumps) e SCI (171 ± 51 jumps) were significantly higher than S1 (42 ± 14 jumps). In addition, the number of CMJs performed during S3 and SCI were significantly higher than S2, while SCI was higher than S3. Regarding exercise duration (S1=171 ± 52 s; S2=346 ± 117 s; S3=610 ± 129 s and SCI=1304 ± 339 s) and sum of concentric impulses (S1=10,297 ± 3,508 N•s; S2=17,077 ± 6,386 N•s; S3=25,883 ± 7,188 N•s and SCI=45,377 ± 14,608 N•s) variables, the significant differences were similar to the responses obtained by number of CMJs for every experimental sessions. Moreover, there was high coefficient of determination (R2 = 0.99 ± 0.01) between the sum of concentric impulses and exercise durations used to estimate the critical interval (7.4 ± 1.3 s). Therefore, the critical power model can be applied to estimate the critical interval in vertical jump exercise, being critical interval the smallest rest period length between CMJs which allows long-term exercise.O modelo de potência crítica pode ser aplicado em várias modalidades esportivas realizadas de forma contínua (ex., corrida e natação) e intermitente (ex., corrida). Entretanto, nenhum estudo verificou a utilização do modelo de potência crítica para saltos verticais realizados de forma intermitente. Sendo assim, o objetivo deste estudo foi verificar se o modelo de potência crítica se ajusta para saltos verticais com contra movimento, realizado com diferentes durações de intervalos passivos entre cada salto vertical. Dez participantes se submeteram a quatro sessões experimentais realizadas em dias diferentes. As primeiras três sessões (S1, S2 e S3) foram utilizadas para determinar o intervalo crítico, que consistia em realizar saltos verticais (semelhante ao movimento de bloqueio no voleibol) sobre uma plataforma de força, com intervalos que variavam entre 4 e 7 s, até a exaustão (incapacidade de manter 95% da altura máxima do salto vertical por três vezes consecutivas). Para cada salto vertical foi determinado o impulso concêntrico através da integração da força de reação do solo vertical no tempo. Então, para cada sessão foi calculada a somatória dos impulsos concêntricos. Assumiu-se que essa somatória representava o trabalho externo total para elevar o centro de massa durante os saltos verticais. Assim, utilizando a equação matemática do modelo linear trabalho-tempo, foi estimado o intervalo crítico. A hipótese é que o intervalo crítico representaria o menor intervalo entre saltos verticais que possibilitaria a realização do exercício por tempo prolongado. Para testar essa hipótese, na 4ª sessão experimental (SIC), os participantes realizaram saltos verticais até a exaustão utilizando o intervalo critico. Em todas as sessões experimentais foram determinados o número de saltos verticais e a duração total do exercício (tempo entre o primeiro e o último salto vertical). O número de saltos verticais realizados em S2 (70 ± 28 saltos), S3 (105 ± 28 saltos) e SIC (171 ± 51 saltos) foram significativamente maiores que S1 (42 ± 14 saltos). Além disso, o número de saltos verticais realizados em S3 e SIC foram significativamente maiores que S2, sendo que SIC foi maior que S3. Com relação às variáveis durações do exercício (S1=171 ± 52 s; S2=346 ± 117 s; S3=610 ± 129 s e SCI=1304 ± 339 s) e somatórias dos impulsos concêntricos (S1=10.297 ± 3.508 N•s; S2=17.077 ± 6.386 N•s; S3=25.883 ± 7.188 N•s e SIC=45.377 ± 14.608 N•s), as diferenças significativas foram similares às obtidas na variável número de saltos verticais em todas as sessões. Além disso, foi observado elevado coeficiente de determinação (R2 = 0,99 ± 0,01) entre a somatória dos impulsos concêntricos e a duração dos exercícios utilizados na estimativa do intervalo crítico (7,4 ± 1,3 s). Portanto, o modelo de potência crítica pode ser utilizado para determinar o intervalo crítico em saltos verticais, sendo que o intervalo crítico representa o menor intervalo entre saltos verticais que induz a realização do exercício por tempo prolongado.Universidade Estadual Paulista - Câmpus de Rio Claro2008-07-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/113710.5016/1137Motriz. Journal of Physical Education. UNESP; V. 14, N. 1 (2008); 105-105Motriz Revista de Educação Física; V. 14, N. 1 (2008); 105-1051980-6574reponame:Motriz (Online)instname:Universidade Estadual Paulista (UNESP)instacron:UNESPporhttps://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/1137/1601Pereira, Gleberinfo:eu-repo/semantics/openAccess2013-04-18T19:34:24Zoai:periodicos.rc.biblioteca.unesp.br:article/1137Revistahttp://www.periodicos.rc.biblioteca.unesp.br/index.php/motrizPUBhttps://old.scielo.br/oai/scielo-oai.phpmotriz@rc.unesp.br||mauerber@rc.unesp.br||azanesco@rc.unesp.br1980-65741415-9805opendoar:2013-04-18T19:34:24Motriz (Online) - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration Efeito da duração do intervalo entre saltos verticais: relação entre impulso concêntrico e duração do exercício |
title |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration |
spellingShingle |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration Pereira, Gleber Potência Crítica. Exercício intermitente. Exaustão. Salto com contra movimento. |
title_short |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration |
title_full |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration |
title_fullStr |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration |
title_full_unstemmed |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration |
title_sort |
Effects of different rest period lengths on vertical jump: the relationship between concentric impulse and exercise duration |
author |
Pereira, Gleber |
author_facet |
Pereira, Gleber |
author_role |
author |
dc.contributor.author.fl_str_mv |
Pereira, Gleber |
dc.subject.por.fl_str_mv |
Potência Crítica. Exercício intermitente. Exaustão. Salto com contra movimento. |
topic |
Potência Crítica. Exercício intermitente. Exaustão. Salto com contra movimento. |
description |
The critical power model has been applied to many sports which are continuously (e.g., run and swim) and intermittently (e.g., run) performed. However, there is no study applying critical power model to intermittent vertical jump exercise. Then, this study aimed to verify whether critical power model fits to countermovement jumps (CMJs) performed with different passive rest period lengths between jumps. Ten males performed four experimental sessions across different days. The 1st, 2nd and 3rd sessions (S1, S2 e S3) were performed in order to determine the critical interval. They consisted of performing intermittent CMJs (likewise volleyball block) on the force platform, manipulating the rest period lengths (from 4 to 7 s), until exhaustion. Three consecutive failures to reach the target height (i.e., 95% maximal jump height) were considered exhaustion. The concentric impulse, determined through vertical ground reaction force integration with time, was estimated for each CMJ. Thus, the sum of concentric impulses was determined for every experimental session. It was assumed that such a sum represented the total external work to elevate the center of mass during the CMJs. Then, the linear work-time mathematical equation was used to estimate the critical interval. It was hypothesized that critical interval represents the smallest rest period length between CMJs allowing long-term exercise. In order to test such hypothesis, in the 4th experimental session (SCI), the subjects performed CMJs until exhaustion using the critical interval. During all experimental sessions, the number of CMJs and exercise duration (time from the first to last jump) were determined. The number of CMJs performed during S2 (70 ± 28 jumps), S3 (105 ± 28 jumps) e SCI (171 ± 51 jumps) were significantly higher than S1 (42 ± 14 jumps). In addition, the number of CMJs performed during S3 and SCI were significantly higher than S2, while SCI was higher than S3. Regarding exercise duration (S1=171 ± 52 s; S2=346 ± 117 s; S3=610 ± 129 s and SCI=1304 ± 339 s) and sum of concentric impulses (S1=10,297 ± 3,508 N•s; S2=17,077 ± 6,386 N•s; S3=25,883 ± 7,188 N•s and SCI=45,377 ± 14,608 N•s) variables, the significant differences were similar to the responses obtained by number of CMJs for every experimental sessions. Moreover, there was high coefficient of determination (R2 = 0.99 ± 0.01) between the sum of concentric impulses and exercise durations used to estimate the critical interval (7.4 ± 1.3 s). Therefore, the critical power model can be applied to estimate the critical interval in vertical jump exercise, being critical interval the smallest rest period length between CMJs which allows long-term exercise. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-07-25 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/1137 10.5016/1137 |
url |
https://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/1137 |
identifier_str_mv |
10.5016/1137 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://www.periodicos.rc.biblioteca.unesp.br/index.php/motriz/article/view/1137/1601 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual Paulista - Câmpus de Rio Claro |
publisher.none.fl_str_mv |
Universidade Estadual Paulista - Câmpus de Rio Claro |
dc.source.none.fl_str_mv |
Motriz. Journal of Physical Education. UNESP; V. 14, N. 1 (2008); 105-105 Motriz Revista de Educação Física; V. 14, N. 1 (2008); 105-105 1980-6574 reponame:Motriz (Online) instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Motriz (Online) |
collection |
Motriz (Online) |
repository.name.fl_str_mv |
Motriz (Online) - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
motriz@rc.unesp.br||mauerber@rc.unesp.br||azanesco@rc.unesp.br |
_version_ |
1800215768972918784 |