The heart rate zone formula is flawed, especially for women. Here's how to rethink your training.

That tension becomes especially clear with heart rate zone training, a popular five-tier system that endurance athletes use ...

NikeSKIMS Review: Can Kim Kardashian’s Activewear Collab Deliver Both Style And Performance?

I’ve tested more activewear than I can stuff in my workout drawers—through HIIT classes, long walks with my energetic dog, ...