​Endurance athletes should consume 1.3 to 1.5 grams of protein per kilogram of body weight

​Endurance athletes should consume 1.3 to 1.5 grams of protein per kilogram of body weight to ensure lean mass and energy. The nitrogen balance method helps determine dietary intakes for protein. For individuals who would want to measure energy expenditure during activity, the accelerometer can be used (the accelerometer is a field device).