A new study uses machine learning to quantify the effects of temperature, humidity, heat, and sun
Scientists take their equations for the energy demand of hills and rough terrain out into the real world
Sound impossible? Runner Jordan Tropf has put in the work—here’s how he pulled it off.
Over the past few years, McCastle has completed 5,804 pull-ups in a single day, pulled a 5,000-pound truck across the Mojave Desert, and climbed a rope the equivalent height of Mount Everest. How on earth has this Navy SEAL dropout accomplished some of the craziest physical feats in recent memory?
A new study investigates how different types of physical performance are affected by the time of day
A new study suggests that hydrogels enable you to down more carbs with less digestive distress, and race faster as a result.
These tips will help you build up to your running goals and stick to your plan.
Expert strategies and intuitive tech to help you set and achieve your goals
A long-running gym debate about whether to train each limb separately comes to the cycling world