Physical Activity in the Treatment of Obesity
| Status: | Completed |
|---|---|
| Conditions: | Obesity Weight Loss |
| Therapuetic Areas: | Endocrinology |
| Healthy: | No |
| Age Range: | 18 - 60 |
| Updated: | 9/30/2017 |
| Start Date: | April 2000 |
| End Date: | May 2004 |
Physical Activity in the Treatment of Obesity: A Randomized Trial
Although exercise is widely regarded as a key component in obesity treatment, few individuals
seem able to adhere to exercise programs over time. In response, efforts have focused on
developing new approaches to physical activity that may appeal to sedentary overweight
persons. For instance, is has been shown that accumulating multiple short bouts of vigorous
exercise may enhance both exercise adherence and weight loss in overweight persons.
Accumulating moderate-intensity activity throughout the day may offer comparable health and
weight benefits as a traditional exercise program. Public health recommendations now include
the option of accumulating 30 minutes of moderate-intensity lifestyle activity for health and
well-being. While these two options offer a viable alternative to those who dislike or cannot
sustain continuous vigorous exercise programs, it is unclear whether the flexibility of
accumulating physical activity or the vigorous intensity of the exercise is responsible for
improved weight loss and long-term adherence.
The goal of this research is to extend our preliminary findings suggesting that moderate
intensity lifestyle activity is an important and viable alternative to traditional structured
vigorous exercise for obese dieting individuals. The primary specific aim of this project is
to compare the effects of three modes of exercise on long-term weight regain. Participants
will be 165 overweight men and women who are sedentary, but otherwise healthy. All
participants will receive the same 16-week behavioral weight loss program and will be
randomized to one of three exercise study conditions: 1) diet-plus-continuous bouts of
vigorous aerobic exercise; 2) diet-plus-short bouts of vigorous aerobic exercise accumulated
throughout the day; or 3) diet-plus-moderate intensity lifestyle activity accumulated
throughout the day. By varying both the intensity and duration of exercise bouts, we can
determine which type of exercise is associated with optimal outcomes one year later.
Additional questions of interest include:
1. Does mode of exercise influence exercise adherence?
2. Does mode of exercise improve cardiovascular risk profiles similarly in all three
conditions?
3. Does mode of exercise influence changes in body composition?
4. Does mode of exercise influence exercise enjoyment and exercise self-efficacy?
seem able to adhere to exercise programs over time. In response, efforts have focused on
developing new approaches to physical activity that may appeal to sedentary overweight
persons. For instance, is has been shown that accumulating multiple short bouts of vigorous
exercise may enhance both exercise adherence and weight loss in overweight persons.
Accumulating moderate-intensity activity throughout the day may offer comparable health and
weight benefits as a traditional exercise program. Public health recommendations now include
the option of accumulating 30 minutes of moderate-intensity lifestyle activity for health and
well-being. While these two options offer a viable alternative to those who dislike or cannot
sustain continuous vigorous exercise programs, it is unclear whether the flexibility of
accumulating physical activity or the vigorous intensity of the exercise is responsible for
improved weight loss and long-term adherence.
The goal of this research is to extend our preliminary findings suggesting that moderate
intensity lifestyle activity is an important and viable alternative to traditional structured
vigorous exercise for obese dieting individuals. The primary specific aim of this project is
to compare the effects of three modes of exercise on long-term weight regain. Participants
will be 165 overweight men and women who are sedentary, but otherwise healthy. All
participants will receive the same 16-week behavioral weight loss program and will be
randomized to one of three exercise study conditions: 1) diet-plus-continuous bouts of
vigorous aerobic exercise; 2) diet-plus-short bouts of vigorous aerobic exercise accumulated
throughout the day; or 3) diet-plus-moderate intensity lifestyle activity accumulated
throughout the day. By varying both the intensity and duration of exercise bouts, we can
determine which type of exercise is associated with optimal outcomes one year later.
Additional questions of interest include:
1. Does mode of exercise influence exercise adherence?
2. Does mode of exercise improve cardiovascular risk profiles similarly in all three
conditions?
3. Does mode of exercise influence changes in body composition?
4. Does mode of exercise influence exercise enjoyment and exercise self-efficacy?
Inclusion Criteria:Sedentary and >30 pounds above healthy weight. No plans to move from
area for next 1.5 years. No plans for excessive travel.
Exclusion Criteria: recent weight loss or regular exercise (≥2 bouts per week), serious
medical or psychiatric condition (cardiovascular, metabolic or orthopedic) or history of
clinical depression or eating disorder.
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