Eric, who lives near sea level in Florida, is running a 5K event in Denver, Colorado, which has an approximate elevation of 1,600 m (5,249 ft). Because long-duration events place considerable demands on and aerobic energy systems, Eric's performance will be affected by the hypobaric conditions at atlititude.

Oxygen transport

Explanation:Oxygen transport is the oxygen that we obligate aerobes need for survival is transported from the lungs to peripheral tissues by the hemoglobin that is densely packed in our red blood cells (erythrocytes). Hemoglobin is the most intensively studied protein in the world, and its structure is known in intimate detail.

The transport of oxygen in blood is undertaken by hemoglobin, the largest component of red blood cells. This protein collects oxygen in respiratory organs, mainly in the lungs, and releases it in tissues in order to generate the energy necessary for cell survival.