Dr. Stephen Seiler demystifies training scores and metrics, giving athletes a clear definition of the fundamental principles of sport science.

Environmental physiologist Dr. Stephen Cheung addresses whether the amount of fat and carbohydrate used for energy changes with the temperature.

Sports medicine guru Dr. Andy Pruitt presents the science and symptoms of the most common knee injuries in cyclists.

Dr. Stephen Seiler answers five endurance training questions on heart rate, zones, polarized training, rest, and much more.

Ryan and Trevor tackle questions on how running can be used in the base season, recovery for time-crunched athletes, the complexity of workouts, pre-race meal planning, and much more.