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

Authors:
Rania A Mekary
Rania A Mekary
MCPHS University
Boston | United States
Diane Feskanich
Diane Feskanich
Channing Laboratory
United States
Frank B Hu
Frank B Hu
Harvard T.H. Chan School of Public Health
United States
Walter C Willett
Walter C Willett
Harvard T.H. Chan School of Public Health
Boston | United States
Alison E Field
Alison E Field
Boston Children's Hospital
United States

Obesity (Silver Spring) 2010 Jan 4;18(1):167-74. Epub 2009 Jun 4.

Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA.

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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http://dx.doi.org/10.1038/oby.2009.170DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2798010PMC

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January 2010
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References

(Supplied by CrossRef)
A descriptive study of individuals successful at long-term maintenance of substantial weight loss
Klem et al.
Am J Clin Nutr 1997
How much physical activity is needed to minimize weight gain in previously obese women?
Schoeller et al.
Am J Clin Nutr 1997
Exercise as an adjunct to weight loss and maintenance in moderately obese subjects
Pavlou et al.
Am J Clin Nutr 1989

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