Active vs. inactive muscle
From DrKoop's partner site on diet and exercise, MyDietExercise.com
People may lose 20 to 40 percent of their muscle -- and, along with it, their strength -- as they age. Scientists have found that a major reason people lose muscle is because they stop doing everyday activities that use muscle power, not just because they grow older.
Review Date: 07/28/2005  advertisement
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