| " A. "No pain, no gain," said bodybuilders in the 1980s. "Pain is weakness leaving the body," brags a Marine Corps T-shirt. "No Pain, No Jane," taunts the billboard advertisements for the Mary Jane ski area in Colorado. "Feel the burn," enthused Jane Fonda. " " People who exercise know muscles sometimes seem to burn during hard exercise or feel a little sore over the next day or two (and the mere thought of pain is often enough to keep some people planted on the couch.) While many fitness professionals and sports medicine researchers believe people should "train, not strain," others (particularly body builders who are going for maximum muscle growth) flat out do not buy that advice. " " Yes, exercise in general (not just weight lifting) can bring on something called "delayed onset muscle soreness," but the correlation between muscle soreness and bigger muscles is still being debated. " "alleged to come from two sources: Waste products that build up in the muscle and/or the microscopic tears in the muscle tissue that occur when the muscles are pushed harder or differently than normal. This can come from trying out a new exercise or by increasing the intensity or duration of the activity. For example, if you usually jog one mile a day, then suddenly decide to push yourself to two or three, some soreness is " " -Be sure to take the time to warm up and cool down after an activity. Slow, easy stretching can be very beneficial to the joints, and a good 15-minute warm-up is recommended to get your cardiovascular system and lungs working. " " -When strength training, start with lighter weights and high repetitions (12-15).
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