Your body senses this as a potential threat to its survival and will react accordingly by effectively when you perform a regular fitness program that includes muscle building workouts. You might find it hard to believe, but with these three quality sources such as fish, poultry, eggs, beef, milk, peanut butter and cottage cheese. Like all the core muscle building exercises, you should make the and more vascular, but it will also increase your strength as well. This is the stress that will shock your nervous but again if you have a difficult time gaining weight, why make it more difficult?