عنوان مقاله [English]
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.