Colorado Runner - Colorado's running news, events and results source

The gut, also called the intestinal tract, includes the stomach, intestines, and colon. An amazing number of life-sustaining and performance enhancing events happen in the gut—including but not limited to digestion of the food we eat and absorption of nutrients that provide energy.

The American College of Sports Medicine (ACSM) is a professional organization with more than 14,000 members who are sports medicine doctors, sports dietitians, exercise scientists, sports psychologists, and other health professionals who work with athletic people.

Are you searching for a race to run this fall? Or maybe you're planning your holiday season and want to run a fun event to get into the spirit! Check out the Colorado Runner calendar online.