Many women exercise and complain that they did not lose weight or gained weight and this may be true for many women. There is a small study recently published which may confirm this.
Aerobic exercise training in women typically results in minimal fat loss, with considerable individual variability. However this study shows some of them gained weight as well.
81 sedentary premenopausal women were studied before and after 12 weeks of exercise which consisted of treadmill exercise for 30 minutes 3 time a day
Overall, women did not lose body weight or fat mass. However, considerable individual variability was observed for changes in body weight (-11.7 to +4.8 kg) and fat mass (-11.8 to +3.7 kg).
Fifty-five women were classified as compensators, and as a group gained fat mass
Change in body weight and fat mass at 4 weeks were moderate predictors of fat loss, and may potentially be useful for identification of individuals who achieve less than expected weight loss or experience unintended fat gain in response to exercise training
1. EXERCISE affects women in variable direction. If there is no weight loss in 4 weeks they need to look for a different strategy. EXERCISE BY ITSELF IS NOT A STRATEGY FOR WEIGHT LOSS
2. It is clear that caloric reduction is essential to lose weight
3. It is likely hat diet and exercise may affect weight loss in a different way
Analysis of data from the study below
J Strength Cond Res. 2014 Oct 28. [Epub ahead of print]
Predictors of fat mass changes in response to aerobic exercise training in women.
Sawyer BJ1, Bhammar DM, Angadi SS, Ryan DM, Ryder JR, Sussman EJ, Bertmann FM, Gaesser GA.
Aerobic exercise training in women typically results in minimal fat loss, with considerable individual variability. We hypothesized that women with higher baseline body fat would lose more body fat in response to exercise training, and that early fat loss would predict final fat loss. 81 sedentary premenopausal women (age: 30.7±7.8 yrs; ht: 164.5±7.4 cm; wt: 68.2±16.4 kg; %Fat: 38.1±8.8) underwent Dual-energy X-ray Absorptiometry before and after 12 weeks of supervised treadmill walking 3 days/wk for 30 min at 70% of VO2peak. Overall, women did not lose body weight or fat mass. However, considerable individual variability was observed for changes in body weight (-11.7 to +4.8 kg) and fat mass (-11.8 to +3.7 kg). Fifty-five women were classified as compensators, and as a group gained fat mass (25.6±11.1 kg to 26.1±11.3 kg; p < 0.001). The strongest correlates of change in body fat at 12 weeks were change in body weight (r = 0.52) and fat mass (r = 0.48) at 4 weeks. Step-wise regression analysis that included change in body weight and body fat at 4 weeks, and submaximal exercise energy expenditure, yielded a prediction model that explained 37% of the variance in fat mass change (R = 0.37, P < 0.001). .
PMID: 25353081 [PubMed – as supplied by publisher]
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