Category Surveys Returned Mean Age Gender (M/F) Major Injuries (%) Chronic Injuries (%) Physical Activity Limitations (%) Daily Limitations (%) Aerobic Exercise (hrs/Week) Anaerobic Exercise (hrs/Week) Athletes* 374 41.1 76% 24% 50% 52% 36% 21% 3.9 2.1 Controls 2991 43.5 52% 49% 10% 11% 6% 4% 1.4 3.0

Table 1: Descriptive Statistics.