sixpenceee: MRI cross sections of upper legs, showing the difference in muscle, intramuscular fat, and subcutaneous fat of a middle aged athlete, an elderly athlete, and an elderly sedentary person.                          

sixpenceee: MRI cross sections of upper legs, showing the difference in muscle, intramuscular fat, and subcutaneous fat of a middle aged athlete, an elderly athlete, and an elderly sedentary person.                          

tags: for the love of beautiful boys,

from: https://mybeautyboy.tumblr.com/post/690074921059123200