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Influence of L-carnitine administration on maximal physical exercise
L Vecchiet1, F Di Lisa, G Pieralisi
1Istituto di Fisiopatologia Medica, Università di Chieti, Italy.
Summary
L-carnitine supplementation improved exercise performance in young men by increasing maximal oxygen uptake and power output. This suggests L-carnitine enhances aerobic efficiency during intense physical activity.
Area of Science:
- Exercise Physiology
- Nutritional Biochemistry
Background:
- L-carnitine plays a crucial role in energy metabolism.
- Its effects on maximal exercise capacity require further elucidation.
Purpose of the Study:
- To investigate the impact of L-carnitine on maximal exercise capacity.
- To assess physiological responses during exercise after L-carnitine administration.
Main Methods:
- Double-blind, cross-over trial with ten moderately trained young men.
- Oral administration of 2g L-carnitine or placebo 1 hour before cycle ergometer exercise.
- Progressive incremental exercise protocol until exhaustion.
Main Results:
- L-carnitine significantly increased maximal oxygen uptake and power output.
- Reduced oxygen uptake, carbon dioxide production, ventilation, and plasma lactate at submaximal intensities.
- Indicated enhanced aerobic metabolism and improved exercise efficiency.
Conclusions:
- Pretreatment with L-carnitine favors aerobic processes.
- L-carnitine administration can lead to more efficient exercise performance.
- Potential mechanisms for L-carnitine's ergogenic effects are discussed.