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 ...

A vein in my forehead is about to burst. Sweat streams off my nose. I’m on a stationary bike, hooked to cords and monitors, a hamster on a wheel, legs spinning, lungs gasping, heart-rate racing to 168 ...

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 ...

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 ...

Over the summer, a physiologist named Karlman Wasserman, formerly of UCLA, passed away at the age of 93. The name may not ring a bell, but you can consider your next threshold workout an unofficial ...

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 ...

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 ...

Chances are you've heard cyclists say they're "training at ninety percent of max heart rate," or some similar figure. Sounds kind of impressive, doesn't it? After all, athletes like to do everything ...