To reduce the risk of injury, it’s best to do a 10- to 15-minute warmup of light aerobic exercise before strength training. Stretching is not necessarily needed before strengthening; however, stretching can be performed afterward with at least 30 seconds of stretch per muscle group. WRONG would be bad form, too heavy, not enough rest, too many sets Rep ranges are 10-15, 3-7 sets, about 10-20 per body part per week, rest 3-7 days depending upon...well...many factors.“Another way...
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