How Does Altitude Affect Cycling Performance?

How do athletes deal with lower available oxygen levels at higher elevations? Subscribe to GCN: Get exclusive GCN gear in the GCN store! Sign up to the GCN newsletter: Ride a bike in any mountain range and at a certain point you’ll get above an elevation where the concentration of oxygen begins to decrease compared to sea level. The Colle Delle Agnello, the highest point of this year’s Giro D’Italia at 2744m, has 25% less ox