Build your stamina.
Endurance is your aerobic engine: how long you can keep going before you tire. It reflects how efficiently your heart, lungs and muscles use oxygen, and it is one of the strongest predictors of a long, active life.
When you take the challenge, this area is scored from a few simple, factual questions and becomes one of the eight sides of your Octagon.
See where you stand in Endurance and across all eight challenges. It takes about two minutes.