Comparison of acute ingestion of carbohydrate and L- carnitine supplementation on exhaustion time and heart rate variability during recovery from graded exercise in male college athletes

چکیده مقاله

Abstract
Aim: Sport supplementation is aconventionalmethod to prevent of
dehydrationand body energystoresdepletion in graded long-term
exercise.Acute carbohydrate and L–carnitine supplementation probably
effect time to exhaustion and heart rate variablility during recovery from
gradedexercise in male college athletes.
Method: Fourty male college athletes were randomly recruitedforthis study,
and divided into 4 groups (control, carbohydrate, L-carnitine and
carbohydrate/L-carnitinesupplementation) and ingested 500 cc supplements,
3 hours before exhaustive exercise. Times to exhaustion, heart rate
variability in recovery and ratingof perceived exertion were recorded and
analysed. One-way ANOVA was used to analyze exhaustion and variance
analysis (4 × 2) for changes in heart rate recovery period.
Results: Acute carbohydrate supplementation (P≤0.05) had significant effect
on time to exhaustion compared to L-carnitine. However, acute
supplementation of carbohydrate and L-carnitine combination had a agreater
effect on time to exhaustion (P≤0.05). Mean while, separate and combined
supplementationhad no significant effects on recovery heart rate variability
and rating of perceived exertion.
Conclusion: Probably, use of combined carbohydrate and L-carnitine
supplementation should be better than seperate carbohydrate or L-carnitine
in graded long- term exercise.
Key words: Supplementation, L-carnitine, exhaustion, heart rate and recovery