Research shows altitude masks make workouts harder but don’t replicate true altitude training. Here’s what the science really says.

Learn how blood flow restriction (BFR) training works, its benefits for athletes and injury rehab, and how to use it safely. This evidence-based guide explains the science, optimal cuff pressures, and how to reduce risks so you can build strength and muscle with lighter loads.

A review of the Ultrahuman Ring AIR, a smart ring that helped me to improve my sleep and recovery between running sessions.