If you're a senior citizen and contemplating a mountain getaway, take note. New study results show that a few days of mild mountain sickness may be in your future.

Although little research has been done on the metabolic effects of high altitudes and senior citizens, a recent study shows that 45% of subjects with a mean age of 68 had mild symptoms of acute mountain sickness during extreme increases in altitude. After five days of acclimation, however, the subjects were well.

High altitude sickness reduces oxygenation of blood and makes people feel tired until they can adjust to the atmosphere. In this study, hemoglobin saturation decreased from 96% to 92% during an elevation increase by 2,500 meters or more.

The researchers suggest limiting activity for the first five days of altitude increase.