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Lookup NU author(s): Dr Deb DulsonORCiD
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© 2016 National Strength and Conditioning Association.Although previous studies have investigated exercise-induced muscle damage (EIMD) after a bout of unloaded drop jumps (DJs), none have investigated the effects of accentuated eccentric load (AEL) DJs on EIMD. The purpose of this study was to investigate the effects of 30 and 50 AEL DJs on strength, jump performance, muscle soreness, and blood markers. Eight resistance trained athletes participated in this study. In week 1, baseline countermovement jump (CMJ), squat jump (SJ), concentric and eccentric peak force (PF), creatine kinase, and muscle soreness were assessed. Subjects then completed 30 AEL DJs and baseline measures were retested immediately postintervention, 1, 24, and 48 hours later. Two weeks later, the subjects completed the same protocol with an increase in AEL DJ volume (50). Subjects' SJ height was reduced in week 1 compared with week 3, postintervention, 1, 24, and 48 hours later (ES = -0.34, -0.44, -0.38, and -0.40). Subjects' CMJ height was reduced in week 1 compared with week 3, postintervention, 1, and 24 hours later (ES = -0.37, -0.29, and -0.39). Concentric PF was reduced in week 1 compared with week 3, postintervention and 24 and 48 hours later (ES = -0.02, -0.23, and -0.32). Eccentric PF was reduced in week 1 compared with week 3, postintervention, 24, and 48 hours later (ES = -0.24, -0.16, and -0.50). In this sample, 30 AEL DJs attenuated the effects of EIMD following which 50 AEL DJs completed 2 weeks later.
Author(s): Bridgeman LA, Gill ND, Dulson DK, Mcguigan MR
Publication type: Article
Publication status: Published
Journal: Journal of Strength and Conditioning Research
Year: 2017
Volume: 31
Issue: 2
Pages: 386-394
Print publication date: 01/02/2017
Acceptance date: 02/04/2016
ISSN (print): 1064-8011
ISSN (electronic): 1533-4295
Publisher: NSCA National Strength and Conditioning Association
URL: https://doi.org/10.1519/JSC.0000000000001725
DOI: 10.1519/JSC.0000000000001725
PubMed id: 27893481
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