If you own a smartwatch or wearable fitness tracker, you’ve likely caught a glimpse of your VO2 max, the maximum amount of oxygen your body can utilize during intense exercise. For endurance athletes, ...

At 42, Dunn qualified for the Olympic Trials at the 2019 Chicago Marathon with a time of 2:43:59. And, at 43, she ran the 2020 Olympic Marathon Trials in 2:53:32. While coaching was a game-changer, ...

If you've got the budget, it's a must-buy ...