WATCH BELOW: Gymnast Simone Biles Drops Never-Before-Seen Move At United States ChampionshipsWe've seen swimmers glide through water like fish, gymnasts perform death-defying acrobatic routines and people lift twice their body weight over their heads like it's not even a big deal.However, it turns out it's a very big deal.These athletes have been training for years, putting their bodies on the line as well as sharpening that mental focus and strength to keep their eyes on the prize.US gymnast