aerobic

The foundation of endurance fitness, built by running at a low intensity where the body primarily uses oxygen to burn fat for fuel.

The foundational phase of training focused on increasing weekly mileage at an easy pace to build aerobic capacity and durability.

A slow, comfortable run designed to promote active recovery while building aerobic base—the most important and most neglected run type.

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

A popular training method created by Dr. Phil Maffetone, where training intensity is strictly limited to a heart rate of 180 minus your age.

The maximum amount of oxygen your body can utilize during intense exercise—the gold standard measurement of aerobic fitness.