Injuries Body Building that you sustain Prime X Factor during exercise can be quit severe. You can pull a muscle or pull vertebrae out of position. If you do injury yourself it will put you out of commission for a week or even for 2 - 3 months. This would an embarrassing situation since it mean lost work time and a certain recovery time.For groups 1-3, do two or three sets, 12-15 reps per set. Groups four and five can do three or four sets per body part, 8-10 reps per set. I believe that we tend to get ourselves into some negative habits when we count reps and sets. True, we do need a general guide-line, but I would rather you try to find the last quality

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