Max Gain Xtreme If you'd like to improve your muscle mass, then you should do less reps, but lift a greater amount of weight. Start off by choosing a muscle group like the chest. To warm up, do a set using weights you can lift easily. Do 15-20 reps during this warm-up set. The second set should be done with a weight with which you can complete only 6-8 repetitions. Add about five more pounds and repeat.One simple way to increase your muscle mass is to lift lots of weight just a few times. Select a certain muscle group and begin your routine. Warm up with lighter weights. Doing 15 to 20 reps of your warm-up weight is ideal.

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