Either aerobic exercise or strength training improves insulin sensitivity in both healthy and insulin-resistant people in most studies, though a recent controlled trial found that aerobic exercise alone did not affect insulin resistance in people with Insulin Resistance Syndrome. Studies comparing strength training to aerobic exercise in insulin-resistant people have reported greater benefits from strength training, but a combination of the two will probably be more effective than either one alone. In addition, exercise has many benefits in reducing many of the risk factors associated with IRS.
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