The effect of rest redistribution on kinetic and kinematic variables during the countermovement shrug

Document Type

Journal Article

Publication Title

Journal of Strength and Conditioning Research

Volume

37

Issue

7

First Page

1358

Last Page

1366

PubMed ID

37347941

Publisher

National Strength and Conditioning Association / Wolters Kluwer

School

School of Medical and Health Sciences

RAS ID

62044

Comments

Meechan, D., McMahon, J. J., Suchomel, T. J., & Comfort, P. (2023). The effect of rest redistribution on kinetic and kinematic variables during the countermovement shrug. The Journal of Strength and Conditioning Research, 37(7), 1358-1366. https://doi.org/10.1519/JSC.0000000000004238

Abstract

This study compared the effects of rest redistribution (RR) on kinetic and kinematic variables during the countermovement shrug (CMS). Twenty-one male subjects (age 27.2 ± 3.3. years, height 1.78 ± 0.07 m, body mass 77.2 ± 10.6 kg, relative 1 repetition maximum (1RM) power clean [PC] 1.22 ± 0.16 kg kg-1) performed the CMS using 140% of 1RM PC with 3 traditional sets of 6 repetitions (TS), 9 sets of 2 repetitions with RR [45 s rest after 2 repetitions] (RR45), and 6 sets of 3 repetitions with RR [72 s rest after 3 repetitions] (RR72). There were no significant or meaningful differences (p > 0.05, g = 0.00-0.15) between set configurations for any variables for the average of the 18 repetitions. There were no significant (p > 0.05) or meaningful (g = 0.00-0.14) differences for configuration and configuration × set for peak (PF) and mean force (MF), peak velocity (PV), impulse, phase duration, peak velocity decline, peak velocity maintenance, and rating of perceived exertion. There was significantly greater (p = 0.034) albeit small (g = 0.15) difference for mean velocity (MV) during TS compared with RR72.There were no significant or meaningful differences (p > 0.05, g = 0.00-0.09) between sets for PF, MF, PV, MV, impulse, and duration across TS, RR45, and RR72.Rest redistribution protocols did not result in greater kinetics or kinematics during the CMS compared with TS, when total rest time was equated. Thus, shorter more frequent rest periods during the CMS may not be required to maintain force-time characteristics.

DOI

10.1519/JSC.0000000000004238

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