The trick to targeting the right muscles to go harder/better/faster/stronger

What's the difference between slow twitch and fast twitch muscle fibers? The pros explain what they are, and why you should be working both.

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Photo: Getty Images/ Thomas Barwick

“I’m an Exercise Physiologist—Here’s Why You Shouldn’t Worry About Cortisol Spikes When You Do HIIT Workouts.” 

There’s a difference between chronic stress and making your body work during workouts.

woman sweating in the gym
Stocksy: Julia and Rob campbell

The 5 Best Pilates Exercises to Improve Flexibility

Stretch your limits with these gentle movements.

Unrecognizable woman stretches arms to legs while stretching on yoga mat on wooden floor of an outdoor terrace.
Photo Credit: Stocksy / Alexander Grabchilev