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The Effect of High-Intensity Intermittent Exercise on Body Composition of Overweight Young Males
The major findings of this study were that HIIE significantly increased VO2peak and significantly reduced total, abdominal, trunk, and visceral fat of young, overweight males. Also trunk and leg fat-free mass was significantly increased after HIIE.
The significant 17% decrease in visceral fat
HIIE may have greater potential than steady-state exercise (e.g., jogging, cycling) to reduce visceral fat. Furthermore, increased fat oxidation after HIIE may occur as a result of the need to remove lactate and H+ and to resynthesize glycogen. Uncoupled respiration, protein turnover, and sympathetic nervous system activity may also contribute to increased energy expenditure and fat oxidation after exercise [9]. Finally, HIIE may also have a suppressive effect on appetite as exposing rats to hard exercise has been repeatedly reported to reduce food intake [31].
As this HIIE program required minimal time commitment, it has implications regarding subject compliance with exercise interventions. Thus, physical activity prescriptions, which require the least effort, while still producing adequate reductions in subcutaneous and visceral fat are likely to be optimal [9] and HIIE would seem to fall under this category as subject’s total exercise commitment was 60?min per week. In conclusion, 20?min of HIIE, performed three times per week for 12 weeks, resulted in significant reductions in total body, abdominal, trunk, and visceral fat and a significant increase in fat-free mass of overweight young males.
The major findings of this study were that HIIE significantly increased VO2peak and significantly reduced total, abdominal, trunk, and visceral fat of young, overweight males. Also trunk and leg fat-free mass was significantly increased after HIIE.
The significant 17% decrease in visceral fat
HIIE may have greater potential than steady-state exercise (e.g., jogging, cycling) to reduce visceral fat. Furthermore, increased fat oxidation after HIIE may occur as a result of the need to remove lactate and H+ and to resynthesize glycogen. Uncoupled respiration, protein turnover, and sympathetic nervous system activity may also contribute to increased energy expenditure and fat oxidation after exercise [9]. Finally, HIIE may also have a suppressive effect on appetite as exposing rats to hard exercise has been repeatedly reported to reduce food intake [31].
As this HIIE program required minimal time commitment, it has implications regarding subject compliance with exercise interventions. Thus, physical activity prescriptions, which require the least effort, while still producing adequate reductions in subcutaneous and visceral fat are likely to be optimal [9] and HIIE would seem to fall under this category as subject’s total exercise commitment was 60?min per week. In conclusion, 20?min of HIIE, performed three times per week for 12 weeks, resulted in significant reductions in total body, abdominal, trunk, and visceral fat and a significant increase in fat-free mass of overweight young males.
