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Ethanol reduces myoglobin release during isokinetic muscle exercise
Acta Medica Scandinavica
|January 1, 1986
Summary
Ethanol consumption reduces exercise-induced increases in serum myoglobin, a muscle damage marker. This effect persists even after alcohol is cleared from the system, suggesting altered muscle cell membrane function.
Area of Science:
- Exercise Physiology
- Biochemistry
- Toxicology
Background:
- Serum myoglobin is a biomarker for skeletal muscle damage.
- Ethanol's effects on exercise physiology and muscle integrity are not fully understood.
Purpose of the Study:
- To investigate the impact of acute ethanol intoxication and its after-effects on exercise-induced serum myoglobin release in healthy males.
Main Methods:
- 12 healthy males underwent a standardized 2-minute isokinetic exercise test.
- Tests were conducted in a habitual state, during moderate ethanol intoxication, and 10-15 hours post-ethanol intake.
- Serum myoglobin, heart rate, and blood lactate levels were monitored.
Main Results:
- No significant differences in muscle work, maximal heart rate, or blood lactate were observed across conditions.
- Serum myoglobin increments post-exercise were significantly reduced (p < 0.05) during ethanol intoxication and 10-15 hours after intake.
- Increased protein elimination did not explain the reduced myoglobin levels.
Conclusions:
- Ethanol intoxication and its residual effects impair the exercise-induced release of myoglobin from skeletal muscle.
- The mechanism likely involves ethanol-induced alterations in muscle cell membrane permeability, potentially mediated by adenylate cyclase activation.