Obesity is the fastest growing health problem in America. At present 66% of Americans over the age of 20 are overweight. Approximately 34% of Americans are obese, which equates to approximately 72 million Americans.
The causes of obesity are complex however, few disagree the primary problem is energy balance (too many calories consumed and too few expanded). It has been suggested that adults who remain sedentary throughout their life span will lose approximately 5 lbs of muscle per decade, while simultaneously adding 15 lbs of fat per decade. In addition the average adult will experience a 15% reduction in fat-free mass between the ages of 30 and 80. It has been determined that body fat is not an age related problem, but instead relates to the number of hours individuals spend exercising per week.
Regular physical activity and exercise is one of the most important factors related to long-term successful weight loss. Exercise should be as frequent as 5 days a week. 40-60 minutes per day, or 20-30 minute sessions twice a day. For exercise beginners activities should consist of low-impact aerobics (walking, rowing, stationary bike and water activities). For the more advanced light resistance training can be added to burn more calories and increase lean muscle mass.
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