In obese adults in their 60s and 70s, moderate weight loss achieved through diet and exercise helps improve physical function and fighting frailty, a study shows. Obesity is found to be an important cause of physical decline in older persons and by predisposing to frailty, can lead to a loss of functional independence. Frailty is the diminished ability to perform important practical and social activities of daily living. In a study, 27 frail obese older volunteers were randomly assigned to 26 weeks of diet and exercise (treatment group) or no treatment (control group). The treatment group attended weekly weight loss meetings and participated in exercise training three times weekly for six months. They also maintained a balanced diet to provide an energy deficit of roughly 750 kcal/d. The treatment group lost 8.4 percent of body weight whereas weight did not change in the control group. The treatment group also saw a drop in fat mass, compared with the control group, without a change in lean fat-free mass. The exercise group also had improvements in physical function, as evidenced, in part, by higher test scores for peak oxygen uptake. The exercise and weight loss intervention also led to objective improvements in muscle strength, walking speed, endurance and balance, which were accompanied by subjective improvements in the ability to function. Researchers from Washington University School of Medicine in St. Louis add it's generally thought that successful weight loss is difficult to achieve in older adults because of ingrained, lifelong diet and activity habits. On the contrary, this study found that most of the subjects looked forward to the weekly group meetings and regular exercise sessions and embraced lifestyle change. The finding supports benefits of weight loss and exercise in decreasing frailty in obese older persons, as well as improving physical functioning and health-related quality of life.
Archives of Internal Medicine ,
April 2006