Journal article
Time Course of Neuromuscular, Hormonal, and Perceptual Responses Following Moderate- and High-Load Resistance Priming Exercise
International Journal of Sports Physiology and Performance, Vol.16(10), pp.1-11
2021
PMID: 33761461
Abstract
The aim of this study was to map responses over 32 hours following high-load (HL) and moderate-load (ML) half-squat priming.
Fifteen participants completed control, HL (87% 1RM), and ML (65% 1RM) activities in randomized, counterbalanced order. Countermovement jump (CMJ), squat jump (SJ), saliva testosterone, saliva cortisol, and perceptual measures were assessed before and 5 minutes, 8 hours, 24 hours, and 32 hours after each activity. Results are presented as percentage change from baseline and 95% confidence interval (CI). Cliff delta was used to determine threshold for group changes.
SJ height increased by 4.5% (CI = 2.2-6.8, Cliff delta = 0.20) 8 hours following HL. CMJ and SJ improved by 6.1% (CI = 2.1-7.8, Cliff delta = 0.27) and 6.5% (CI = 1.2-11.8, Cliff delta = 0.30), respectively, 32 hours after ML. No clear diurnal changes in CMJ or SJ occurred 8 hours following control; however, increases of 3.9% (CI = 2.9-9.2, Cliff delta = 0.26) and 4.5% (CI = 0.9-8.1, Cliff delta = 0.24), respectively, were observed after 32 hours. Although diurnal changes in saliva hormone concentration occurred (Cliff delta = 0.37-0.92), the influence of priming was unclear. Perceived "physical feeling" was greater 8 hours following HL (Cliff delta = 0.36) and 32 hours after ML and control (Cliff delta = 0.17-0.34).
HL priming in the morning may result in small improvements in jump output and psychophysiological state in the afternoon. Similar improvements were observed in the afternoon the day after ML priming.
Details
- Title
- Time Course of Neuromuscular, Hormonal, and Perceptual Responses Following Moderate- and High-Load Resistance Priming Exercise
- Authors
- Peter W Harrison (Author) - University of QueenslandLachlan P James (Author) - La Trobe UniversityDavid G Jenkins (Author) - University of the Sunshine Coast, Queensland, School of Health and Behavioural Sciences - LegacyMichael R McGuigan (Author) - Auckland University of TechnologyRobert W Schuster (Author) - University of QueenslandVincent G Kelly (Author) - Queensland University of Technology
- Publication details
- International Journal of Sports Physiology and Performance, Vol.16(10), pp.1-11
- Publisher
- Human Kinetics, Inc.
- DOI
- 10.1123/ijspp.2020-0646
- ISSN
- 1555-0273
- PMID
- 33761461
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Behavioural Sciences - Legacy
- Language
- English
- Record Identifier
- 99578807902621
- Output Type
- Journal article
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- Physiology
- Sport Sciences
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