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Fatigue during high-intensity intermittent exercise: application to bodybuilding
Charles P Lambert1, Michael G Flynn
1Nutrition, Metabolism and Exercise Laboratory, Donald W. Reynolds Department of Geriatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA. LamberCharlesP@uams.edu
Sports Medicine (Auckland, N.Z.)
|June 22, 2002
Summary
Resistance exercise can cause fatigue due to phosphocreatine depletion, acidosis, and carbohydrate loss. Nutritional strategies may help delay this muscle fatigue during intense workouts.
Area of Science:
- Exercise Physiology
- Sports Nutrition
- Biochemistry
Background:
- Resistance exercise is crucial for athletes and fitness enthusiasts aiming to enhance muscle mass, strength, and physical appearance.
- Understanding the physiological mechanisms of fatigue is essential for optimizing training and performance.
Purpose of the Study:
- To review the primary causes of fatigue during resistance exercise.
- To explore potential nutritional interventions to mitigate exercise-induced muscle fatigue.
Main Methods:
- Literature review of studies investigating physiological changes during resistance exercise.
- Analysis of research on nutritional strategies impacting muscle energy metabolism and fatigue.
Main Results:
- Evidence suggests phosphocreatine depletion contributes to fatigue.
- Intramuscular acidosis is identified as a potential factor in exercise-induced tiredness.
- Carbohydrate depletion may also play a role in limiting performance during resistance training.
Conclusions:
- Fatigue during resistance exercise is multifactorial, involving energy system limitations and metabolic disturbances.
- Nutritional interventions targeting carbohydrate availability and energy replenishment show promise in delaying muscle fatigue.
- Further research into specific nutritional strategies can optimize resistance training outcomes.