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Comparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristics

2022Journal article Open access
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dc.contributor.authorLum, Danny
dc.contributor.authorComfort, Paul
dc.contributor.authorBarbosa, Tiago M.
dc.contributor.authorBalasekaran, Govindasamy
dc.date.accessioned2021-12-06T16:32:51Z
dc.date.available2021-12-06T16:32:51Z
dc.date.issued2022
dc.description.abstractThe 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationLum, 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. 187-197pt_PT
dc.identifier.doi10.5114/BIOLSPORT.2022.103575pt_PT
dc.identifier.issn0860-021X
dc.identifier.urihttp://hdl.handle.net/10198/24462
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstitute of Sportpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCountermovement jumppt_PT
dc.subjectIsometric mid-thigh pullpt_PT
dc.subjectPeak powerpt_PT
dc.subjectReactive strength index modifiedpt_PT
dc.titleComparing the effects of plyometric and isometric strength training on dynamic and isometric force-time characteristicspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage197pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage187pt_PT
oaire.citation.titleBiology of Sportpt_PT
oaire.citation.volume39pt_PT
person.familyNameBarbosa
person.givenNameTiago M.
person.identifier.ciencia-id8B11-BDC4-F6FF
person.identifier.orcid0000-0001-7071-2116
person.identifier.scopus-author-id10044856400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication941a6f14-cfba-458a-a2e3-0cbd1846cd42
relation.isAuthorOfPublication.latestForDiscovery941a6f14-cfba-458a-a2e3-0cbd1846cd42

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