In this video, Fitness model Troy Ad shun takes you through a powerful upper body workout that will help any skinny guy pack on rock solid lean muscle mass. 

For all you guys who love to workout your upper body and are looking for a training routine to maximize the largest and most powerful muscles in the upper body - this is the workout.

 Strive to consume at least 1 to 1.5 grams of protein per pound of body weight and 1.5 to 2 grams of carbs per pound of body weight . 

 Your dietary fat intake should account for 0.5 grams of fat per pound of body weight.

best muscle building workout