Medical Definition of ISOMETRIC. 1. : of, relating to, or characterized by equality of measure; especially: relating to or being a crystallographic system characterized by three equal axes at right angles. 2.
ALSO READ: Diet for Abs: Foods for Six Packs Abs. Muscle Building: Worst Foods for Abs #2. Commercial peanut butter: Peanut butter is one of the best foods you can consume if you want to build muscle, due to its high protein content. Peanut butter is also a great post workout snack.
Lean, Protein-Rich Foods. Protein provides amino acids -- the building blocks of muscle. While the belief that more protein is better for increasing muscle isn't necessarily true, according to the ADA, your protein needs do increase to about 15 to 20 percent of your total daily calories when you are strength training.