What should you do if you are too skinny? Gain muscle is the easiest way to get what it needs to transform your body. There are special workout programs aimed at skinny guys and gals but the core of these workouts is basically a high-intensity training. The goal is to exercise with heavy weights and send the right signals to your body. The message is “build muscle” and the best way to send such signals is to workout with repetitions as low as three and weights near the maximum. Skinny people usually lack the strength to start with heavy weights but this changes quickly once the regular workout is showing first results.