VO2 Max

A runner reports reaching a VO2 Max score of 50 after months of gradual, consistent training. VO2 Max, a measure of how efficiently the body uses oxygen during exercise, is widely tracked by runners and fitness enthusiasts as a key indicator of aerobic fitness. Reaching the 50 mark is considered a solid achievement for recreational athletes, and the post is resonating with others pursuing similar training goals.

A developer named Petr Jahoda is building Negative Splits, a running app for Mac and iPhone that works with Apple Watch data. The app displays runs, sleep, HRV, VO2 max and training load, maps each run with pace along the route, flags negative splits, and includes a coach that plans training toward a user's goal.