We examined the fatigue and recovery for 48 h following a full-body resistance exercise session in trained men.
Experimental cross-sectional study.
Eight resistance trained men volunteered to participate (mean ± SD; age 27.0 ± 6.0 years, height 1.79 ± 0.05 m, weight 81.8 ± 6.8 kg, training experience 7.8 ± 5.0 years). Fatigue and pain was measured before, after, 1 h post, 24 h and 48 h post the full-body resistance exercise session, which was based on in-season models used in contact team sports (e.g. AFL, NRL). Other measures included maximal torque and rate of torque development, central motor output (quadriceps muscle activation, voluntary activation, H-reflexes), and muscle contractility (evoked twitch responses). Linear mixed-model ANOVA procedures were used for data analysis.
Fatigue, soreness, and muscle pain did not return to pre-exercise levels until after 48 h rest. Quadriceps maximal torque and muscle contractility were reduced from pre-exercise (p < 0.01), and did not return to pre-exercise levels until 24 h. Early rates of torque development and muscle activation were unchanged. The amplitude and slope of the normalized quadriceps H-reflex was higher immediately after exercise (p < 0.05).
Full-body resistance exercise including multiple lower limb movements immediately reduced maximal torque, muscle contractility, and increased pain. While recovery of voluntary and evoked torque was complete within a day, 48 h rest was required for fatigue and pain to return to baseline. Maximal voluntary effort may be compromised for lower-limb training (i.e. sprinting, jumping) prescribed in the 48 h after the session.
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Published online: July 04, 2017
Accepted: June 27, 2017
Received in revised form: April 4, 2017
Received: February 8, 2017
© 2017 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.