Cardio workouts stuck in one gear? Bust out of your rut — and build fitness — with this collection of metabolism-boosting workouts.
Random moments of “unproductive” time don’t just make you healthier, happier, and more resilient. They help you work smarter, too.
Three different metabolic energy systems power your workouts — and your day. Here’s how each one works, and how to make the most of them all.
Adding a short pause at the end of a tough set can help you overcome plateaus in your resistance-training routine.