National Geographic : 2018 Jul
Classical ballet dancers such as Esmiana Jani, 25, from the Washington Ballet, put enormous force on their ankles and knees when land- ing jumps. They are the only athletes in the world who must point the foot to its absolute extreme while bearing weight. To help recover more quickly, they use inflatable “boots” that massage their leg mus- cles from the toes to the top of the thighs. Record-breaking weightlifter CJ Cum- mings, 18, defended his Youth World Cham- pionship in 2017 and broke his own world record for the “clean and jerk” by lifting 407 pounds.