As the health risks of obesity gain widespread attention, a crucial question emerges: Does being lean naturally make you healthy? How low should body fat go, and what is the best way to reduce it? Pro bodybuilder Jin Shicheng shares lessons from his competitive career on what happens when body fat drops too low.

For regular fitness-goers, balanced nutrition comes first. Gentle calorie adjustment, not harsh restriction, supports both your physical well-being and your appearance.

Executive Producer: Zhang Jingwen

Producer: Yang Sha

Director: Chen Qingxuan

Video editors: Chen Qingxuan

Videographers: Yang Zhigang

Cover photo: Yu Peng