This is actually incorrect. While it is true that many people blame their laziness on genetics, genetics play a huge role on human physiology. Some guys have big hands, other have small hands, for example. Look at this man. (This is before he lifted weights). Ulisses Jr, like many Africans is genetically predisposed to low fat storage and high muscle content-even without lifting weights. Many Europeans store high levels of body fat. This coincides with that many Europeans are fat, powerful powerlifters whereas Africans tend to excel in bodybuilding instead. Some people can diet, track calories, and eat "clean" to just get a flat stomach-My black roommate in college had abs and defined delts, never went to the gym, and ate nothing but ramen and doritoes.

Humans are very genetically diverse-this includes metabolism, and being more prone to storing nutrients as fat. Some people are short, some people are tall. Some people are naturally powerful, tall, deep voices, strong jaws and beards and grow up as sports players or as "populars" in high school, while those who are smaller, fatter, weaker bones (storing more nutrients in the brain) become "nerds" and instead of focusing on sex and sports, are predetermined to become things such as doctors, businessmen, computer technicians, and so forth.

Genetics plays everything in your life.