endurance

The dreaded moment when your body runs out of glycogen and you feel like you can't take another step.

A concentrated carbohydrate supplement in gel form, used during long runs and races to quickly replenish energy stores.

A run-walk-run strategy popularized by Olympian Jeff Galloway to help runners of all abilities finish distances without injury.

The state where the body's stored carbohydrate reserves run low, leading to fatigue and "bonking."

A road race of 21.0975 kilometers (13.1 miles). Often considered the most popular race distance due to its balance of challenge and recovery.

The most famous brand of long-distance triathlon, consisting of a 2.4-mile swim, 112-mile bike, and 26.2-mile run.

A training method focused on running long distances at a comfortable, conversational pace to build aerobic endurance.

A long-distance road race with an official distance of 42.195 kilometers (26.219 miles), the ultimate test of human endurance.

A sustained effort run at "comfortably hard" pace, designed to improve your lactate threshold.

A multisport race consisting of swimming, cycling, and running, performed in that specific order.

Any footrace longer than the traditional marathon distance of 42.195 kilometers, ranging from 50k to hundreds of miles.