Maka ihe karịrị afọ 20, National Academy of Sports Medicine (NASM) emeela ọkọlọtọ na asambodo, ịga n'ihu mmụta, ngwọta na ngwaọrụ maka ahụike na ahụike, arụmọrụ egwuregwu na ọkachamara n'ịgwọ egwuregwu.
