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| Resistance Training Improves Glucose Control in Diabetics |
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Patients with type 2 diabetes combining aerobic and resistance exercise improve glucose control, physical performance, and body fat composition, according to a study published in the November 2008 issue of Physical Therapy. "Although aerobic exercise is what is typically recommended for treating people with diabetes, this study shows that adding a high-force strength training component has significant advantages," says Robin L Marcus, the study's lead researcher. Diabetes affects approximately 24 million adults and children in the United States. The onset of type 2 diabetes, a chronic illness marked by decreased insulin sensitivity and overall poor glucose control, is fostered by decreased physical activity. "This study, which comes as the nation marks American Diabetes Month, is especially pertinent in light of new research highlighting the escalating costs and serious side effects of certain diabetes drugs," said Marcus. "Patients with diabetes and their health care providers should be encouraged that physical therapy has been shown to be a cost-effective and safe treatment alternative." The Physical Therapy Journal study, "Comparison of Combined Aerobic and High-Force Eccentric Resistance Exercise With Aerobic-Only Exercise for People With Type 2 Diabetes Mellitus," evaluated 15 people with type 2 diabetes who participated in a 16-week supervised exercise training program: seven in a combined aerobic and eccentric resistance exercise program, and eight in a program of aerobic exercise only. In another study titled "Fat, Muscle, and the Benefits of Exercise for People With Diabetes" Marcus and other experts discuss new information about the roles of fat in people with diabetes, especially fat in muscle, and about how this fat appears to impair muscle function. Paul LaStayo, PT, PhD, the study's senior author, notes that the eccentric resistance exercise program was specifically designed to increase strength and muscle size, using a recumbent stepper that produced a lengthening contraction, such as when lowering the dumbbell in a bicep curl. After 3 months, Marcus and LaStayo found that both groups showed improved glucose control and physical performance in a 6-minute walk, as well as a decrease in fat composition within the leg muscles. "This study is particularly interesting because the patients who did both aerobic and resistance exercise had additional improvements, most notably a decreased overall BMI and a gain in leg muscle," Marcus said. "Although aerobic exercise is still key in treating diabetes, it should not be used in isolation," Marcus observes. "As people age, they lose muscle mass and, subsequently, mobility, resulting in a greater risk of falls. Adding resistance training to the diabetes treatment regimen leads to improved thigh lean tissue which, in turn, may be an important way for patients to increase resting metabolic rate, protein reserve, exercise tolerance, and functional mobility, she notes. 1. Robin L Marcus, et al. Comparison of Combined Aerobic and High-Force Eccentric Resistance Exercise With Aerobic-Only Exercise for People With Type 2 Diabetes Mellitus. American Physical Therapy Association November 2008. 2. Paul LaStayo, et al. Fat, Muscle, and the Benefits of Exercise for People With Diabetes. American Physical Therapy Association. November 2008. 3. Image by xMelissa More Diabetes Related Articles
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