Strength training that repeatedly contracts and relaxes muscles may be more effective than aerobic exercise such as running in treating obesity and diabetes, according to a new study. A research team at the Fralin Biomedical Research Institute at the Virginia Tech Carilion School of Medicine recently published the findings in the Journal of Sport and Health Science. For the experiment, researchers induced obesity and type 2 diabetes in mice by feeding them a high-fat diet, then divided them into a strength training group and an aerobic exercise group. They built a “mouse-only strength training device” that required the animals to lift a weight to access food. Mice in the aerobic group were given free access to a running wheel. After eight weeks, both exercise groups showed significantly reduced weight gain compared with mice that did not exercise. They also saw a reduction in fat mass and improvements in fasting glucose and insulin sensitivity. The effects, however, were greater in the strength training group, including larger reductions in visceral and subcutaneous fat. Their fasting
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