Although agility — the ability to change speed and direction quickly while maintaining control of the body — is vital to sports such as basketball, soccer and even swimming, it also plays a role in ...

Reiko Ito, age 46, is one of the 75 certified AFAA (Aerobics and Fitness Association of America) instructors in Japan, a teacher to other trainers and one of the few qualified to lead SAQ (Speed, ...