A theory developed in the 1940s by 'W.H. Sheldon' to classify human physical types dictates there are three main body compositions determined predominantly by genetics.
Ectomorph (usually thin, naturally resemble a long distance runner).
Endomorph (generally larger frame with difficulty shifting fat).
Mesomorph (often both quick and powerful, builds lean muscle quite easily). Now this is purely a theory, something you may decide to trial. Often our bodies will consist a combination of, or even all. We may also alter the ratios on a long-term basis based on our lifestyles, exercise regime, nutrition, etc. but in general... (continue reading)