[Eye of Unk]

No kidding, almost any female in the Olympics will give up their breast size for athletic performance, just check out the amount of near flat chesters there are.

Saw one well endowed lady in sports, major hassle and distraction to her and spectators.

[jdsteel]

Boobs are mostly fat. These young athletes have very low body fat. After they finish their training and get back to a less severe diet nature will bring back those assets to where they should have been!

[SeaHawkFan]

Most are not as flat as they appear. Modern sports bras are designed to compress the breasts to minimize bounce and be more comfortable while competing.