The fatigue of a full body resistance exercise session in trained men. Issue 4 (April 2018)

• Record Type: Journal Article
• Authors: Marshall, Paul W.M.; Cross, Rebecca; Haynes, Michael
• Is Part Of: Journal of science and medicine in sport. Volume 21:Issue 4(2018)
• Page Start: 422
• Page End: 426
• Publication Date: 2018-04
• Subjects: Fatigue -- H-reflex -- Voluntary activation -- Pain; Sports sciences -- Periodicals; Sports medicine -- Periodicals; Exercise -- Physiological aspects -- Periodicals; Sports -- physiology -- Periodicals; Sports Medicine -- Periodicals; Sportgeneeskunde; 617.102705
• DOI: 10.1016/j.jsams.2017.06.020
• Languages: English
• ISSNs: 1440-2440

Abstract

Abstract: Objectives: We examined the fatigue and recovery for 48 h following a full-body resistance exercise session in trained men. Design: Experimental cross-sectional study. Methods: 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. Results: 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). Conclusions: 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.