Effects of Low-intensity Exercise Training and L-carnitine Supplement on Substrate Oxidation, Fat Mass and Maximal Oxygen Consumption

บทคัดย่อ

The purpose of this research was to study the effects of low-intensity exercise training at 45%VO 2max with 2 mgs of L-carnitine supplements per day for 4 weeks on substrate oxidation, fat mass and maximal oxygen consumption (VO 2max). Thirty-two male undergraduate students aged 19 to 22 years were recruited from the Faculty of Sport Science, Burapha University. The participants were divided into 4 groups with 8 members each group; Group I performed low-intensity exercise training with L-carnitine supplements, Group II performed low-intensity exercise training with placebos, Group III performed only low-intensity exercise training, and Group IV was the control group. Measurement values of substrate oxidation, fat mass and maximal oxygen consumption were tested and data was statistically analyzed by using paired samples t-test and repeated MANOVA. Pre-post intervention match comparison was performed using the method of Scheffe at level of significance .05. According to the findings, for mean of fat oxidation, low-intensity exercise training with L-carnitine supplements (74.22%) had higher than low-intensity exercise training with placebos (58.44%), low-intensity exercise training (57.60%), and the control group (49.05%) with statistical significance. Concerning mean fat mass and maximal oxygen consumption among all 4 groups were not differ, the findings revealed low-intensity exercise training with L-carnitine supplements to have increased mean fat oxidation by 28.1%. Low-intensity exercise training with placebos and low-intensity exercise training increased mean fat oxidation by approximately 9.4-11.9%. In conclusion, low-intensity exercise training at 45%VO 2max with 2 mgs of L-carnitine supplements per day was a method with the effect of increasing fat oxidation but fat mass and maximal oxygen consumption were not significance. Lcarnitine supplements should be consumed with proper food consumption. Persons allergic to L-carnitine supplements should avoid taking the supplements.