I Nengah Sandi, born in Bangli in 1966, is a lecturer at the Faculty of Mathematics and Natural Sciences, Udayana University with the position of Head Lector. Education: S1 Physics, Masters in Sports Physiology, and S3 in Medicine in the field of Sports Physiology. So far he has written 3 books and has edited 4 books with ISBNs. Has written scientific papers on sports physiology in national and international journals. Active in physical measurement of athletes in various sports in Bali. He is also active as an administrator of the Association of Indonesian Sports Physiologists (PAIFORI) Bali. Besides that, he is also active as a sports manager for IPSI and PERTINA Bali.