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 ...

If you're an endurance athlete, your lactate threshold can be an incredibly useful training tool – but what exactly is it, and how can you measure and use it? Lactate is created when muscle tissue ...

Add Yahoo as a preferred source to see more of our stories on Google. woman on a treadmill doing a lactate threshold test During intense or prolonged exercise, muscles can feel like they’re burning ...

As a runner, it’s helpful to know your lactate thresholds. And, yes, you read that right: thresholds. Plural. There is more than one lactate threshold that matters when it comes to pacing yourself and ...

Besides sore quads and chafe marks, most new runners have one thing in common: confusion over the term “lactate threshold pace.” It pops up in training plans next to “easy effort” (self-explanatory) ...

Conner Mantz crushed the 2025 Boston Marathon with a personal best time of 2:05.08—just off the podium in fourth place! Meanwhile Jess McClain, the top American woman, came in at 2:22:43 for seventh ...

If there is one stat that every cyclist wants to know, it’s their “VO2max.” Just what does this secret number mean? And more importantly, why is it a pretty near meaningless red herring, and what ...