Dear Dr. Roach: I see people walking everywhere with weighted vests. Is this a good idea for exercise?

— M.B.W.

Dear M.B.W.: In my opinion, there are plusses and minuses about a weighted vest. On the good side, they increase the intensity of workouts and activate muscles that don't ordinarily get much exertion during a walk. The abdominal and back muscles in particular can get a better workout with a weighted vest. There is more cardiovascular benefits as well. An additional benefit is enhanced bone strength.

On the down side, there is a greater risk for injury, especially if a person uses too much weight too quickly. This is particularly the case for back injuries. Weighted vests are probably not appropriate for people with structural back issues (such as scoliosis) or those with a h

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