The half marathon is having a moment—but for many runners, it will be the first time they have to carefully consider pace, ...

This kind of training improves your aerobic capacity by gradually increasing how efficiently your body uses oxygen, says Sims. If you can track your VO2 max regularly, it can be a great way to ...

"The rowing machine is incredibly versatile and can be used for any type of workout, from HIIT training to Zone 2 cardio for building aerobic capacity," Gornik adds. "The key is k ...