Acute fatigue, and perceptual responses to resistance exercise.
BACKGROUND
Despite assumptions, there is an absence of research on acute fatigue responses to high- and low-load and advanced technique resistance exercise.


METHODS
Trained males (n = 8; age 27.2 ± 7.4 years, height 180.0 ± 6.6 cm, weight: 86.6 ± 10.3 kg) were assessed for decrement in maximal voluntary isometric torque (MVIT) and perceived effort and discomfort after heavier load (HL; 80% MVIT), lighter load (LL; 30% MVIT), forced repetition (FR), and breakdown set (BD) training protocols.


RESULTS
Analyses revealed a significant reduction in MVIT (P < 0.05) with a significant between-condition effect, and significant post-hoc pairwise comparisons between LL and both HL (P = 0.044) and FR (P = 0.013). There were no significant between-condition effects for effort or discomfort (P > 0.05).


CONCLUSIONS
Fatigue as a decrement in force production appears to follow a more complex relationship than simply 100% minus the force requirements of the task relative to a maximal voluntary contraction. Muscle Nerve 56: E141-E146, 2017.
School of Sport, Health and Social Science, Southampton Solent University, East Park Terrace, Southampton, SO14 0YN, UK.
James Peter
http://orcid.org/0000-0002-6013-8402
JP
Fisher
School of Sport, Health and Social Science, Southampton Solent University, East Park Terrace, Southampton, SO14 0YN, UK.
Joshua
J
Farrow
School of Sport, Health and Social Science, Southampton Solent University, East Park Terrace, Southampton, SO14 0YN, UK.
James
J
Steele
D000222:Adaptation, Physiological / Q000502:physiology*; D000328:Adult; D018592:Cross-Over Studies; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology*; D010465:Perception / Q000502:physiology*; D055070:Resistance Training / Q000379:methods*; D016474:Weight-Bearing / Q000502:physiology*; D055815:Young Adult
advanced resistance exercise; fatigue; high load; isometric strength; low load; muscle damage