Working out keeps the ladies lean and fit, and so their tits are mostly, or all, muscle. That is true of many female athletes in different sports.

Years of heavy exercise change the metabolism and hormone quantities in a woman's body which causes changes in their menstrual cycle, it may even stop, as well as how fat is stored and distributed. Excess baggage will be ahead to make the body more efficient when doing the required exercise. Runners are especially susceptible to this problem. Obviously more calories burned than taken in will drop body weight and if it is the right kind of calories then body fat will be lost and muscle will be built.

Simple.Sports bras.They hold em back like I would.