Table 1. Subject characteristics. Group Gender Age in years ASIA rating Level of injury UIC 1 M 31 NA NA 2 M 29 NA NA 3 M 24 NA NA 4 F 23 NA NA 5 M 24 NA NA Mean (±SD) 26.2 (3.0) IC 1 M 17 A C5 2 M 24 B C5 3 M 18 A T6 4 M 47 A C7 5 F 46 A T8 Mean (±SD) 30.4 (14.0) IE 1 M 18 A C5 2 M 20 A C4-C5 3 F 17 A T4 4 M 24 B T6 5 M 26 A T7 Mean (±SD) 22.2 (5.0) UIC; uninjured control, IC; injured control, IE; injured exercise trained