Simply put, endurance is the ability to sustain prolonged physical activity and fueling allows us to sustain a higher rate for longer. Proper hydration allows us to better tolerate the fuel while allowing for better thermoregulation (heat management) and better resource distribution during activity.  

Trail running involves changing terrain, shifting grades, varied footing, and unpredictable conditions. Because of that, measuring effort is more nuanced than simply looking at pace. Two common methods to attempt to quantify effort are RPE (Rate of Perceived Effort) and HR (Heart Rate).

Discover why strength and mobility training are essential for trail runners who want to improve performance, prevent injuries, and stay strong on the trails for years to come.