Sea level heart rates are difficult to use as an indication of intensity at altitude. Heart rate is only a loose relative guide to recovery at altitude. Normal iron stores during this time are not sufficient to meet iron demand for hemoglobin synthesis2. When training at altitude, athletes fatigue quicker and require longer recovery periods. Thus, it is important for athletes to get adequate rest.
Naps are worth including in the schedule.
This can be a problem at altitude. After 3 weeks, it is still below sea level values2. It takes about six days at sea level for it to normalize. Athletes should thus be encouraged to increase their fluid intake, both at altitude and upon return to sea level. Intake of diuretics, such as caffeine should be kept at a minimum.