Influence of rest interval duration on muscular power production in the lower-body power profile

Nibali, M.I., Chapman, D., Robergs, Robert A., & Drinkwater, E.J. (2013) Influence of rest interval duration on muscular power production in the lower-body power profile. Journal of Strength and Conditioning Research, 27(10), pp. 2723-2729.

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There is a paucity of evidencebased support for the allocation of rest interval duration between incremental loads in the assessment of the loadpower profile. We examined the effect of rest interval duration on muscular power production in the load-power profile and sought to determine if greater rest is required with increasing load (i.e., variable rest interval). Ten physically trained men completed 4 experimental conditions in a crossover balanced design. Participants performed jump squats across incremental loads (0-60 kg) on 4 occasions, with an allocated recovery interval of 1, 2, 3, or 4 minutes. The mean log-transformed power output at each load was used for comparison between conditions (rest intervals). Unloaded jump squats (0 kg) maximized power output at each condition. The maximal mechanical power output was 66.6 6 6.5Wkg21 (1 minute), 66.2 6 5.2 Wkg21 (2 minutes), 67.1 6 5.9 Wkg21 (3 minutes), and 66.2 6 6.5 Wkg21 (4 minutes). Trivial or unclear differences in power output were observed between rest intervals at each incremental load. As expected, power declined per 10 kg increment in load, the magnitude of decrease was 13.9-14.5 (confidence limits CL: 61.3-2.0%) and 13.4-14.6% (CL: 62.4-3.9%) for relative peak and mean power, respectively, yet differences in power output between conditions were likely insubstantial. The prescription of rest intervals between loads that are longer than 1 minute have a likely negligible effect on muscular power production in the jump squat incremental load-power profile. Practitioners should select either a 1- to 4-minute rest interval to best accommodate the logistical constraints of their monitoring sessions.

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ID Code: 96780
Item Type: Journal Article
Refereed: Yes
Keywords: adult; article; biomechanics; crossover procedure; human; male; movement (physiology); muscle strength; physiology; rest; skeletal muscle; time, Adult; Biomechanical Phenomena; Cross-Over Studies; Humans; Male; Movement; Muscle Strength; Muscle, Skeletal; Rest; Time Factors
DOI: 10.1519/JSC.0b013e318280c6fb
ISSN: 1533-4287
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Schools > School of Exercise & Nutrition Sciences
Copyright Owner: 2013 National Strength & Conditioning Association.
Deposited On: 26 Jul 2016 04:21
Last Modified: 26 Jul 2016 23:46

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