Chess tournament shows you really burn a lot of calories while thinking

If you want to lose a few extra pounds though, there are some better ways.

How Chess Players can Lose up to 15 Pounds in One Week just by Sitting

Does Chess Burn Calories: the Ultimate Workout? - RANK CHESS

Did you know that - FIDE - International Chess Federation

How Elite Chess Players Burn More Than 6,000 Calories

A Guide to Help Scholastic Chess Players Avoid Mental and Physical Exhaustion During Tournaments, by Armando Almase, Teachers on Fire Magazine

Chess: More than just black and white - FISU

Everyday Activities That Burn the Most Calories

Chess tournament players burn up to 6,000 calories a day - boing - Boing Boing BBS

The Secret These Chess Champions Use to Win Isn't Skill—It's Physical Workouts

Fabiano Caruana: Daily Routine - Balance The Grind