A question often enough by people who exercise with weights is whether you need to lift many weights a few reps or few to many. Let's see first a little about the frequency of repetitions. When he says "a few repetitions" we mean a repetition range between 1-5. The exercises http://www.dietmythsandfacts.com/2013/10/old-school-new-body-user-reviews.html with a few repetitions is effective to create the so-called myofibrillar hypertrophy. Ie increasing the number of filaments of distant and myosin in muscle tissue, when our muscles becomes more dense and acquires more power.This range is between 6 to 12 repetitions. It is the range that causes the highest growth in muscle volume. The reason is that it provides all the good few iterations with the advantages of many repetitions Also, studies have shown that the (provisional) swelling caused by this iterations range increases protein synthesis in muscle.While i.e. few iterations cause myofibrillar hypertrophy (density), the normal (relatively many relatively large resistance) causing sarcoplasmic hypertrophy (swelling).