TABLE 2.
Force plate and markerless motion capture variables in Marine Officer Candidates (MOCs).
| Male MOCs (n = 547) | Female MOCs (n = 121) | ||||||
|---|---|---|---|---|---|---|---|
| Abbreviation | MSKI (n = 109) | noMSKI (n = 438) | Male MOCs (n = 547) | MSKI (n = 44) | noMSKI (n = 77) | Female MOCs (n = 121) | |
| Kinetic variables | |||||||
| Braking RFD (N/s) | BRFD | 3,349 ± 1,675 | 3,782 ± 1,832 | 3,696 ± 1,808 | 2,180 ± 1,153 | 2,524 ± 1,223 | 2,399 ± 1,205 |
| Avg. braking force (N) | ABF | 1,190 ± 207 | 1,235 ± 201 | 1,226 ± 203 | 907 ± 128 | 963 ± 147 | 943 ± 143 |
| Avg. relative braking force (%BW) | ARBF | 152.7 ± 19.6 | 156.4 ± 19.1 | 155.6 ± 19.3 | 147.7 ± 18.5 | 150.2 ± 16.6 | 149.3 ± 17.3 |
| Avg. propulsive force (N) | APF | 1,364 ± 198 | 1,404 ± 208 | 1,396 ± 206 | 995 ± 125 | 1,044 ± 144 | 1,026 ± 139 |
| Avg. relative propulsive force (%BW) | ARPF | 174.9 ± 13.0 | 177.6 ± 16.3 | 177.1 ± 15.7 | 161.6 ± 12.1 | 162.6 ± 11.9 | 162.2 ± 12.0 |
| Braking net impulse (N.s) | BNI | 109 ± 21 | 112 ± 21 | 111 ± 21 | 76 ± 14 | 83 ± 15 | 81 ± 15 |
| Propulsive net impulse (N.s) | PNI | 222 ± 33 | 227 ± 33 | 226 ± 33 | 147 ± 21 | 157 ± 22 | 153 ± 22 |
| Peak relative propulsive power (W/kg) | PRPP | 53 ± 7 | 54 ± 8 | 54 ± 8 | 43 ± 6 | 44 ± 6 | 43 ± 6 |
| Peak propulsive power (W) | PPP | 4,215 ± 789 | 4,335 ± 827 | 4,311 ± 820 | 2,699 ± 491 | 2,853 ± 492 | 2,797 ± 495 |
| Kinematic variables | |||||||
| Braking phase (s) | BP | 0.29 ± 0.08 | 0.27 ± 0.07 | 0.28 ± 0.07 | 0.28 ± 0.07 | 0.28 ± 0.06 | 0.28 ± 0.06 |
| Propulsive phase (s) | PP | 0.39 ± 0.05 | 0.38 ± 0.06 | 0.38 ± 0.05 | 0.40 ± 0.05 | 0.40 ± 0.06 | 0.40 ± 0.06 |
| Time to take off (s) | TTTO | 1.11 ± 0.14 | 1.09 ± 0.14 | 1.10 ± 0.14 | 1.10 ± 0.14 | 1.10 ± 0.12 | 1.10 ± 0.13 |
| Max hip flexion (degrees) a | HF | 99.9 ± 15.4 | 97.6 ± 16.1 | 98.0 ± 16.0 | 103.0 ± 17.7 | 105.7 ± 15.5 | 104.8 ± 16.4 |
| Max knee flexion (degrees) a | KF | 116.3 ± 14.0 | 114.7 ± 14.7 | 115.0 ± 14.6 | 109.1 ± 11.2 | 113.3 ± 14.7 | 111.8 ± 13.6 |
| Max ankle flexion (degrees) a | AF | 33.7 ± 6.3 | 32.8 ± 6.0 | 33.0 ± 6.0 | 34.5 ± 6.7 | 33.7 ± 5.1 | 34.0 ± 5.7 |
| Dynamic valgus (degrees) a | DV | 5.7 ± 3.4 | 5.5 ± 3.0 | 5.5 ± 3.0 | 6.7 ± 3.4 | 7.1 ± 3.8 | 6.9 ± 3.6 |
| Performance variables | |||||||
| Jump height (m) | JH | 0.40 ± 0.07 | 0.40 ± 0.07 | 0.40 ± 0.07 | 0.28 ± 0.05 | 0.29 ± 0.05 | 0.29 ± 0.05 |
| Modified reactive strength index (JH/TTTO) | mRSI | 0.36 ± 0.08 | 0.38 ± 0.09 | 0.38 ± 0.09 | 0.26 ± 0.06 | 0.27 ± 0.07 | 0.27 ± 0.07 |
a
Markerless motion capture variables; MSKI = Lower Extremity and Torso; noMSKI = Upper Extremity, Head and Neck, and noMSKI; Two-way ANOVA for Sex*Injury results in text; MSKI = Musculoskeletal Injury; data presented as mean ± standard deviation.