How often should you work out? What should you eat before and after working out, and should you have a different diet for cardio workouts versus lifting weights? How much should you customize your workouts for your age, gender, and condition? Will this abdominal exercise hurt your back or help it? How much rest should you get between days of weight lifting? Is long-distance running enough of a benefit to your overall health to justify the pounding on your knees? The questions and complexity are literally endless. Here are a few of the exercise “musts” you hear all the time. Do thirty minutes
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