Abstract
This study aimed to evaluate the effect of different daily physical activity (PA) frequencies, while maintaining the same daily volume of PA, on weight loss, carbohydrate metabolism, and lipid metabolism in women with overweight or obesity throughout a 24-week intervention. During their weight-loss plan, 65 women (BMI=27-35kg/m2 ; age=18-40years) who had a sedentary lifestyle were randomly allocated to the following groups: diet plus a long bout of moderate physical activity (LBP) (one 50-minute bout of moderate-intensity PA) 6d/wk or diet plus short bouts of moderate physical activity (SBP) (two 25-minute bouts of moderate-intensity PA) 6d/wk. Anthropometric and blood measurements were taken at baseline and at 24weeks. Compared with the LBP group, the SBP group had a greater decrease in weight (SBP: -8.08±2.20kg; LBP: -6.39±2.28kg; P=0.019), BMI (SBP: -3.11±0.87kg/m2 ; LBP: -2.47±0.86kg/m2 ; P=0.027), and waist circumference (SBP: -8.78±2.62cm; LBP: -5.76±2.03cm; P=0.026). No significant differences were seen in carbohydrate and lipid metabolism characteristics after 24weeks. PA undertaken in two shorter bouts per day could be more effective for weight loss than PA undertaken in a daily long bout in adult women in a 24-week weight-loss program.
Highlights
The worldwide epidemic of obesity has resulted in calls for prevention and treatment strategies
Some studies indicated that weight loss was similar between accumulated and continuous exercise training [13,14,15], whereas other studies indicated superior health benefits gained from physical activity (PA) in multiple bouts [16, 17], and some studies indicated more weight loss and superior health benefits gained from one continuous PA bout [18,19,20]
A total of 8 participants dropped out for different reasons (1 in the longer-bout of PA (LBP) group due to illness, 4 because of loss of interest in completing the study (3 in LBP group and 1 in shorter-bouts of PA (SBP) group), 1 in the LBP group experienced an unexpected pregnancy, 1 from the SBP group left the study due to relocation and 1 participant in SBP group withdrew without giving any reason)
Summary
The worldwide epidemic of obesity has resulted in calls for prevention and treatment strategies. It is recommended that PA should be an integral part of the management of weight loss, weight maintenance [2] and the treatment of abdominal obesity [3]. It appears that weight-loss interventions containing PA are more effective than dietary instruction alone, for long-term weight management [4, 5]. The results of studies of the impact of accumulated versus continuous exercise on weight loss are contradictory and inconclusive. Available evidence was insuffıcient and contradictory to determine whether accumulated exercise was as effective as continuous exercise for outcomes such as adiposity, blood lipids, and indicators of psychological well-being [21]
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