Physical activity in relation to long-term weight maintenance after intentional weight loss in premenopausal women.

Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA.
Obesity (Impact Factor: 4.39). 06/2009; 18(1):167-74. DOI: 10.1038/oby.2009.170
Source: PubMed

ABSTRACT The type and amount of physical activity (PA) needed for prevention of weight regain are not well understood. We prospectively examined the associations between patterns of discretionary PA and 6-year maintenance of intentional weight loss among 4,558 healthy premenopausal women who were 26-45 years old in 1991 and had lost >5% of their body weight in the previous 2 years. Participants reported their PA and weight in 1991 and 1997. The outcome was weight regain, defined as regaining in 1997 >30% of the lost weight between 1989 and 1991. Between 1991 and 1997, 80% of women regained >30% of their previous intentional weight loss. An increase of 30 min/day in total discretionary activity between 1991 and 1997 was associated with less weight regain (-1.36 kg, 95% confidence interval (CI) = -1.61, -1.12), particularly among overweight women (BMI >/=25) (-2.45 kg, -3.12 to -1.78). Increased jogging or running was associated with less weight regain (-3.26 kg; -4.41 to -2.10) than increased brisk walking (-1.69 kg; -2.15 to -1.22) or other activities (-1.26 kg; -1.65 to -0.87). Compared to women who remained sedentary, women were less likely to regain >30% of the lost weight if they maintained 30+ min/day of discretionary PA (odds ratio (OR) = 0.69, 0.53 to 0.89) or increased to this activity level (OR = 0.48, 0.39 to 0.60). Conversely, risk was elevated in women who decreased their activity. Increased PA, particularly high intensity activities, is associated with better maintenance of weight loss. The benefits of activity were greater among overweight/obese than normal weight women.

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    ABSTRACT: Health clinic workers are potential agents of change for weight loss to patients, yet their be-haviors are not well known. This study examined physical activity (PA) levels and dietary habits of health clinic workers who were and who were not trying to lose weight. Participants were 64 community health clinic workers (58 females and 6 males). Moderate-to-vigorous intensity (MVI) time spent in PA was assessed by triaxial accelerometry over 7 consecutive days. Dietary habits and weight loss efforts were determined by a food frequency questionnaire. Differences in MVI and nutrition variables were assessed by one-way ANOVA, comparing those trying to lose weight and those not trying to lose weight. 48 out of 64 health clinic workers (approximately 75%) indicated that they were currently trying to lose weight. There were significant differences (p < 0.05) in Body Mass Index (BMI), daily energy (Kcal) and fat (g) intake between those trying to lose weight and those not trying to lose weight. There were no significant differences in MVI, daily sugar intake (g), vegetable and fruit serv-ings, and daily fiber intake (g) between groups. Health clinic workers trying to lose weight ap-pear to be engaging in some appropriate dietary but not PA behaviors.
  • 05/2014; 2(8). DOI:10.1016/S2213-8587(14)70108-1
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    ABSTRACT: Prevalence of obesity has increased recently especially in women. Obesity is related to mortality due to non-communicable diseases and has become a public health issue. Among the two important factors to reduce weight calorie limitation alone is modestly effective in initial weight but can result in weight gain after primary weight reduction is common. Therefore adding physical activity to weight maintenance program can reduce weight gain rebound. The aim of this review article was to identify the preventive effect of physical activity on weight maintenance in overweight women. Articles were selected from PubMed database and screened for the relativity to the study objectives, using scoring systems. Eleven studies were found appropriate. No statistical test was done on the data except simple mean and some descriptive analyses. Physical activity is proved to have a significant effect in weight loss/maintenance both in induction and maintenance period. This effect was more significant in higher intensities. Sever intensity physical activity can be effective in weight maintenance in long term but the effect of moderate and light physical activity could not be evaluated due to lack of data.


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May 19, 2014