Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua

Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua

Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua

Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua

Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua

Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua

Competitors flex their muscles during World Bodybuilding and Physique Sports Championship 2015 in Bangkok, Thailand, Nov. 27, 2015. The three-day competition attracted more than 800 bodybuilding enthusiasts across the world. Photo: Xinhua