Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/24462 |
Resumo: | The purpose of the study was to compare the change in dynamic and isometric force-time characteristics after plyometric (PLYO) or isometric strength training (ISO). Twenty-two endurance runners (age = 37 ± 6 years, stature = 1.71 ± 0.05 m, body mass = 62.7 ± 8.6 kg, weekly mileage = 47.3 ± 10.8 km) performed a countermovement jump (CMJ) and isometric mid-thigh pull (IMTP) test during pre- and post-tests. They were then randomly assigned to either PLYO or ISO group and completed 12 sessions of intervention over six weeks. The PLYO included drop jump, single leg bounding and split jump, and the ISO included IMTP and isometric ankle plantar flexion. Significant and large time x group interactions were observed for CMJ countermovement depth (P = 0.037, ƞ2p = 0.21) and IMTP and relative peak force (PF) (P = 0.030, ƞ2p = 0.22). Significant and large main effects for time were observed in CMJ height, peak power, propulsive phase duration, countermovement depth, reactive strength index modified, IMTP PF and relative PF (P < 0.05, 0.20 ≤ ƞ2p ≤ 0.65). Effect for time showed small improvement in CMJ height for both PLYO (P < 0.001, d = 0.48) and ISO (P = 0.009, d = 0.47), small improvement in CMJ PP in PLYO (P = 0.020, d = 0.21), large increase in countermovement depth (P = 0.004, d = 1.02) and IMTP relative PF (P < 0.001, d = 0.87), and moderate increase in propulsive phase duration (P = 0.038, d = 0.65) and IMTP PF (P < 0.001, d = 0.55) in ISO. There were large differences between groups for percentage change in countermovement depth (P = 0.003, d = 0.96) and IMTP relative PF (P = 0.047, d = 0.90). In conclusion, both PLYO and ISO improved CMJ jump height via different mechanisms, while only ISO resulted in improved IMTP PF and relative PF. |
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Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristicsCountermovement jumpIsometric mid-thigh pullPeak powerReactive strength index modifiedThe purpose of the study was to compare the change in dynamic and isometric force-time characteristics after plyometric (PLYO) or isometric strength training (ISO). Twenty-two endurance runners (age = 37 ± 6 years, stature = 1.71 ± 0.05 m, body mass = 62.7 ± 8.6 kg, weekly mileage = 47.3 ± 10.8 km) performed a countermovement jump (CMJ) and isometric mid-thigh pull (IMTP) test during pre- and post-tests. They were then randomly assigned to either PLYO or ISO group and completed 12 sessions of intervention over six weeks. The PLYO included drop jump, single leg bounding and split jump, and the ISO included IMTP and isometric ankle plantar flexion. Significant and large time x group interactions were observed for CMJ countermovement depth (P = 0.037, ƞ2p = 0.21) and IMTP and relative peak force (PF) (P = 0.030, ƞ2p = 0.22). Significant and large main effects for time were observed in CMJ height, peak power, propulsive phase duration, countermovement depth, reactive strength index modified, IMTP PF and relative PF (P < 0.05, 0.20 ≤ ƞ2p ≤ 0.65). Effect for time showed small improvement in CMJ height for both PLYO (P < 0.001, d = 0.48) and ISO (P = 0.009, d = 0.47), small improvement in CMJ PP in PLYO (P = 0.020, d = 0.21), large increase in countermovement depth (P = 0.004, d = 1.02) and IMTP relative PF (P < 0.001, d = 0.87), and moderate increase in propulsive phase duration (P = 0.038, d = 0.65) and IMTP PF (P < 0.001, d = 0.55) in ISO. There were large differences between groups for percentage change in countermovement depth (P = 0.003, d = 0.96) and IMTP relative PF (P = 0.047, d = 0.90). In conclusion, both PLYO and ISO improved CMJ jump height via different mechanisms, while only ISO resulted in improved IMTP PF and relative PF.Institute of SportBiblioteca Digital do IPBLum, DannyComfort, PaulBarbosa, Tiago M.Balasekaran, Govindasamy2021-12-06T16:32:51Z20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/24462engLum, Danny; Comfort, Paul; Barbosa, Tiago M.; Balasekaran, Govindasamy (2022). Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics. Biology of Sport. ISSN 0860-021X. 39:1, p. 187-1970860-021X10.5114/BIOLSPORT.2022.103575info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-16T01:33:38ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
title |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
spellingShingle |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics Lum, Danny Countermovement jump Isometric mid-thigh pull Peak power Reactive strength index modified |
title_short |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
title_full |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
title_fullStr |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
title_full_unstemmed |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
title_sort |
Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics |
author |
Lum, Danny |
author_facet |
Lum, Danny Comfort, Paul Barbosa, Tiago M. Balasekaran, Govindasamy |
author_role |
author |
author2 |
Comfort, Paul Barbosa, Tiago M. Balasekaran, Govindasamy |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Lum, Danny Comfort, Paul Barbosa, Tiago M. Balasekaran, Govindasamy |
dc.subject.por.fl_str_mv |
Countermovement jump Isometric mid-thigh pull Peak power Reactive strength index modified |
topic |
Countermovement jump Isometric mid-thigh pull Peak power Reactive strength index modified |
description |
The purpose of the study was to compare the change in dynamic and isometric force-time characteristics after plyometric (PLYO) or isometric strength training (ISO). Twenty-two endurance runners (age = 37 ± 6 years, stature = 1.71 ± 0.05 m, body mass = 62.7 ± 8.6 kg, weekly mileage = 47.3 ± 10.8 km) performed a countermovement jump (CMJ) and isometric mid-thigh pull (IMTP) test during pre- and post-tests. They were then randomly assigned to either PLYO or ISO group and completed 12 sessions of intervention over six weeks. The PLYO included drop jump, single leg bounding and split jump, and the ISO included IMTP and isometric ankle plantar flexion. Significant and large time x group interactions were observed for CMJ countermovement depth (P = 0.037, ƞ2p = 0.21) and IMTP and relative peak force (PF) (P = 0.030, ƞ2p = 0.22). Significant and large main effects for time were observed in CMJ height, peak power, propulsive phase duration, countermovement depth, reactive strength index modified, IMTP PF and relative PF (P < 0.05, 0.20 ≤ ƞ2p ≤ 0.65). Effect for time showed small improvement in CMJ height for both PLYO (P < 0.001, d = 0.48) and ISO (P = 0.009, d = 0.47), small improvement in CMJ PP in PLYO (P = 0.020, d = 0.21), large increase in countermovement depth (P = 0.004, d = 1.02) and IMTP relative PF (P < 0.001, d = 0.87), and moderate increase in propulsive phase duration (P = 0.038, d = 0.65) and IMTP PF (P < 0.001, d = 0.55) in ISO. There were large differences between groups for percentage change in countermovement depth (P = 0.003, d = 0.96) and IMTP relative PF (P = 0.047, d = 0.90). In conclusion, both PLYO and ISO improved CMJ jump height via different mechanisms, while only ISO resulted in improved IMTP PF and relative PF. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-06T16:32:51Z 2022 2022-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/24462 |
url |
http://hdl.handle.net/10198/24462 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Lum, Danny; Comfort, Paul; Barbosa, Tiago M.; Balasekaran, Govindasamy (2022). Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics. Biology of Sport. ISSN 0860-021X. 39:1, p. 187-197 0860-021X 10.5114/BIOLSPORT.2022.103575 |
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 |
Institute of Sport |
publisher.none.fl_str_mv |
Institute of Sport |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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