One of the best measures of running fitness is lactate threshold (LT), which is the running speed or heart rate at which lactate — an intermediate product of aerobic metabolism in the muscles — begins ...

Swimmers often encounter lactate sets throughout their training, yet several misconceptions exist about the body’s production of lactic acid and experiences of fatigue. Let’s start off with getting ...

Add Yahoo as a preferred source to see more of our stories on Google. Woman running on treadmill during fitness test being conducted by sports scientist If you're an endurance athlete, your lactate ...

Plus, how to ride faster for longer without fatiguing.

Jakob Ingebrigtsen winning gold in the 1500 at the Tokyo Olympics. One aspect of this regimen is regular blood-lactate testing (yup, with a needle) and running intervals at an intensity low enough to ...

Runners throw around the term “tempo run” like confetti. It’s confusing, even for well seasoned athletes, because it’s not a cut-and-dried definition like a lactate threshold workout. In order to make ...

Spoiler alert: I really like running. I've run eight marathons in my time and have Berlin Marathon in the calendar for September - it's my form of escapism, my way of unwinding after a busy day, and ...