HOUSTON, Texas (KTRK) -- In the NFL, there are numbers nearly everywhere, whether it's on jerseys, the scoreboard or down markers. But, in this age of COVID-19, there's one magic number: the cycle ...

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 ...

Recently, low-intensity training, specifically training below the aerobic threshold, has continued to rise in popularity. How can you quickly and easily estimate your aerobic threshold, without ...

One critical component of customizing fitness and training is having a solid gauge of fitness and its progress over a season and year-to-year. Outside of laboratory-based tests, a standardized field ...