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The Journal of Sports Medicine and Physical Fitness 2015 Nov 26

lingua: Inglese

Effects of high-impact aerobics vs. mixed low-impact aerobics and strength training program on body composition, physical fitness and CVD risk factors in overweight and obese grade I women

Mohamed S. A. 1, Lamya N. 2, Olfa N. 3, Hamda M. 3

1 Physical Education Department, College of Education, King Faisal University, Al-Hasa, Saudi Arabiya;
2 Institute of Sports And Physical Education of Kef, Tunisia;
3 Institute of Sports And Physical Education of Ksar-Said, Tunisia


BACKGROUND: regular exercise is one of the factors determining weight reduction and fat loss, and at the same time it is associated with important health benefits. The purpose of this study was to compare the effects of 2 different modalities of exercise on changes in body composition, physical fitness, and CVR factors in healthy overweight and obese women.
METHODS: Thirty-two women were randomly assigned in 2 groups: High impact aerobics group (HIA, n=16) and Low- impact aerobics combined with a strength training program group (LIAS, n=16). Body weight (BW), body composition, aerobic fitness (AF), speed and agility, vertical-jump distance (VJ), abdominal muscle endurance (AME), the flexibility of the lower back and hamstrings, heart rate (HR), systolic (SBP) and diastolic blood pressure (DBP), total cholesterol (TC), triglyceride (TG), HDL-C, LDL-C, Apolipoprotein A-I (Apo A-I) and B (Apo B) were measured at baseline and at the end of the training period.
RESULTS: A significant decrease was noted in all anthropometric variables excepting fat-free mass (FFM) which increased in LIAS group (p<0.05). Comparisons between groups noted significant differences in favor of HIA group in BW, %F and FM, and in favor of LIAS group in FFM (p<0.05 for all). DBP, HR, TC, LDL-c, TG, and Apo B significantly decreased, and HDL-C and Apo A-I significantly increased in both groups. No significant modifications were noted in SBP and glucose concentrations. Significant improvements in all physical fitness components were also noted in HIA group (p<0.05), however, only the AF, VJ, AME, and the flexibility were improved in LIAS group (p<0.01). Comparison between groups reported that values related to VJ and AME were higher in LIAS compared to HIA group (p<0.01).
CONCLUSION: our findings noted that a 24-week of HIA or LIAS training improved body composition, physical fitness and CVR factors in overweight and obese women. Nevertheless, the use of each training method remains tributary to wished effects. In fact, HIA training method is more effective in body weight reduction and fat loss, however, LIAS training method is more appropriate when the improvement of FFM, aerobic fitness and muscle strength is claimed.

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