Packing on size is easy, as long as proper techniques are applied. Keep in mind that everyone has a different body type. Here are some tips to help you gain muscle mass.
#1 Weight Train
Train with heavy weights using less reps. Using appropriate weight, you should only be able to do 4-8 reps. Using heavy weights and low reps puts your muscles and nervous system under much more stress than using lighter weights for many reps. The rest time in between sets should be approximately 2 to 3 minutes.
#2 Eat more Calories
To gain mass, you should strive to eat around 18-20 times you body weight in calories. The extra calories are needed to build new muscles and to repair muscle tissue that is damaged during the heavy workouts. However, do not consume empty calories; go for foods which provide you with correct nutrients essential for gaining muscle.
#3 Eat more Protein
Only diets high in protein help build muscle when incorporated with intense physical training. Without protein, your body will not be able to build new muscle. Carbs serve mainly as energy for the body where as protein provides the necessary amino acids to build and repair...