Aerobic Capacity after Contracting Infectious Mononucleosis

Infectious mononucleosis can be disabling to athletes of all ages. Traditionally, long periods of limited physical activity are prescribed. During this time period a significant level of detraining can occur. Sixteen cadets from USMA who were identified as having mononucleosis had their aerobic capacity determined immediately after becoming afebrile. Nine of these cadets then entered a 2-week exercise program while the others remained inactive. After this time period all cadets were allowed to exercise at their own discretion. After an additional 2-week period (4 weeks after becoming afebrile), aerobic capacity was again determined. There were no differences within the groups when comparing VO2 max, METS, or run time to exhaustion on the two aerobic tests. One individual served as a case study with aerobic tests every week for 4 weeks and then 6 months after becoming afebrile. Again, no differences were observed in any variables measured. Thus, prolonged bed rest does not seem to be indicated for the individual recovering from mononucleosis. Noncontact activities can be initiated as soon as the fever disappears. J Orthop Sports Phys Ther 1986;8(4):199-202.