Get To Know Your Body’s 3 Energy Systems to Become a Stronger, Faster Runner

Your body has three gears, or "energy systems." Here's how to tap into all three to become a stronger, faster, smarter runner.

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Photo: Getty Images/Leo Patrizi

“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