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Peripheral and central fatigue after high intensity resistance circuit training
Gonzalo Márquez1, Salvador Romero-Arenas1, Cristian Marín-Pagán2
1Department of Physical Education and Sport, Faculty of Sport Sciences, Catholic University of Murcia (UCAM), Murcia, Spain.
Muscle & Nerve
|March 28, 2017
Summary
High-intensity resistance circuit training caused greater neuromuscular fatigue and metabolic stress than traditional strength training. This suggests HIRC may induce more peripheral fatigue due to impaired excitation-contraction coupling.
Area of Science:
- Exercise Physiology
- Sports Science
- Neuromuscular Adaptation
Background:
- Resistance training is crucial for athletic performance and health.
- High-Intensity Resistance Circuit (HIRC) training is a time-efficient alternative to Traditional Strength Training (TST).
- Understanding the differential effects of HIRC and TST on fatigue is essential for optimizing training protocols.
Purpose of the Study:
- To compare the neuromuscular fatigue and metabolic responses between HIRC and TST in trained individuals.
- To investigate the impact of different training structures on peripheral and central fatigue mechanisms.
- To evaluate the physiological stress induced by HIRC versus TST.
Main Methods:
- Twelve trained young subjects participated in a counterbalanced crossover study.
- Subjects completed both HIRC and TST protocols with a one-week washout period.
- Neuromuscular function (twitch interpolation) and metabolic responses (blood lactate) were assessed.
Main Results:
- HIRC significantly reduced maximal voluntary contraction and resting potentiated twitch amplitude, indicating greater peripheral fatigue.
- TST did not elicit significant changes in these neuromuscular parameters.
- Blood lactate concentration increased significantly more following HIRC compared to TST.
Conclusions:
- HIRC induces greater peripheral neuromuscular fatigue than TST, likely due to impaired excitation-contraction coupling.
- The higher metabolic stress (lactate accumulation) during HIRC may contribute to the increased peripheral fatigue.
- Training protocols should consider these distinct fatigue profiles when designing exercise regimens.
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