In the Netflix super-hot Korean reality show "Physical: 100 People", 100 contestants with muscular men and women, competed in various physical challenges, which sparked global interest. Their spirit of dedication to the end is convincing. At CUHK, there is a "muscle exercise professor" who not only adheres to the mission of fitness and teaching, but also develops a social enterprise with missions. From a professor to a social enterprise CEO, he fully demonstrates that a sportsman is not only "powerful", but also "brainy". He is our cover character, professor Raymond Sum, Associate Dean (Undergraduate Studies) and Associate Professor of Department of Sports Science and Physical Education, CUHK. This issue: #SportScience #Gym #PhysicalFitnessTest #AdolescentHealth #Training #Physical Literacy