Personal trainers and exercise class instructors seem to have an acronym for everything, and it can be hard to keep up. Between gym slang like PR (personal record), HIIT (high intensity interval ...

Intensity is not a feeling or an emotion. Intensity is effort level. Use the fitness principles FITT (Frequency, Intensity, Time and Type) to create changes to your usual workout by simply changing ...

Few of you are coming to me with a focus on your one mile pace, so we’re looking at running workouts that are going to test your speed and improve your endurance. There are tons of ways to incorporate ...

It stands for as many reps (or rounds) as possible, and if youre a CrossFitter, youre likely well acquainted with this intense method of metabolic conditioning. If youre not familiar with the protocol ...

In what might be some of the most exciting news this year, Sweat (a.k.a. the app co-founded by Aussie fitness star Kayla Itsines, and home to workouts from trainers Kelsey Wells and Cass Olholm) has ...

Many runners find pushing themselves in training and racing as one great source of enjoyment for the hobby, which is why once a month in our Runner’s World+ member newsletter we describe a quality ...