How Altitude Training Changes Your Nutrition Needs

Training at altitude (typically above roughly 2,000-2,500 meters) puts real additional stress on the body: appetite often decreases even as calorie needs rise, and both fluid loss and red blood cell production increase, raising the need for both iron and water.

Because appetite tends to drop at altitude precisely when the body needs more fuel, deliberately scheduling regular meals and snacks — rather than waiting for hunger cues — helps prevent an unintentional calorie deficit during an altitude camp. Iron-rich foods (or a supplement, if recommended by a doctor after bloodwork) support the increased red blood cell production altitude training is often used to stimulate.

Hydration needs also rise at altitude due to increased fluid loss through breathing and urination — thirst alone is an unreliable guide here, so a more deliberate fluid-intake schedule is worth planning before an altitude camp begins.