Secondary Logo

Institutional members access full text with Ovid®

Share this article on:

A warm-up routine that incorporates a plyometric protocol potentiates the force generating capacity of the quadriceps muscles

Johnson, Mariskaa; Baudin, J. Pierre; Ley, Alejandro La,b; Collins, David Fa,b

The Journal of Strength & Conditioning Research: June 08, 2017 - Volume Publish Ahead of Print - Issue - p
doi: 10.1519/JSC.0000000000002054
Original Research: PDF Only

This study was designed to investigate whether a warm-up routine that incorporates drop jumps, induces post-activation potentiation (PAP), and if so, assess the magnitude and time course of the induced PAP. Participants performed a standard warm-up that incorporated either drop jumps (plyometric protocol) or a low-paced walk (control protocol). PAP was assessed by changes in electrically-evoked isometric muscle twitches recorded throughout both protocols. The plyometric protocol increased peak twitch torque (PTT), rate of force development (RTD) and impulse significantly (by 23%, 39% and 46%, respectively) with no change in the amplitude of simultaneously-evoked M-waves, indicating that the augmented torque was due to PAP. These increases returned to baseline within 6 minutes, and PTT and RTD fell below baseline values at 11 - 16 minutes after the drop jumps. PTT, RTD and impulse decreased significantly following the standard warm-up. These results provide evidence that drop jumps induce PAP, markedly enhancing the force generating capacity of the muscle. In contrast, the standard warm-up did not potentiate, but rather reduced, the force generating capacity of the muscle. We suggest that drop jumps be incorporated into warm-up routines directly prior to athletic performance to maximize the force generating capacity of muscle.

a Human Neurophysiology Laboratory, Faculty of Physical Education and Recreation, University of Alberta, Edmonton, Alberta, Canada.

b Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada.

Correspondence: David F. Collins, Address: Faculty of Physical Education and Recreation, E-488 Van Vliet Centre, University of Alberta, Edmonton, Alberta Canada T6G 2H9, Phone: (780) 492-6506, Fax: (780) 492-2364, E-mail: dave.collins@ualberta.ca, Webpage: www.dfcollins.ca

Copyright © 2018 by the National Strength & Conditioning Association.