Table 4.
Quadriceps force variability
| Outcome | Groups | |||||||
|---|---|---|---|---|---|---|---|---|
| Pre-surgery | Week 5 post-surgery | Week 12 post-surgery | Week 26 post-surgery | |||||
| Exp (n = 22) | Con (n = 21) | Exp (n = 22) | Con (n = 21) | Exp (n = 22) | Con (n = 21) | Exp (n = 22) | Con (n = 21) | |
| Eccentric 60°/s | ||||||||
| Reconstructed leg (Nm) | 21 (12) | 27 (19) | 31 (12) | 31 (15) | 23 (17) | 22 (13) | 18 (8) | 17 (8) |
| Non-injured leg (Nm) | 21 (7) | 22 (13) | 17 (10) | 21 (14) | 15 (5) | 19 (10) | 16 (6) | 15 (6) |
| Isometric | ||||||||
| Reconstructed leg (Nm) | 3 (1) | 3 (1) | 3 (1) | 3 (1) | 2 (1) | 3 (1) | 2 (1) | 2 (1) |
| Non-injured leg (Nm) | 3 (1) | 3 (1) | 3 (1) | 3 (1) | 2 (1) | 3 (1) | 3 (3) | 3 (1) |
| Concentric 60°/s | ||||||||
| Reconstructed leg (Nm) | 16 (8) | 18 (7) | 14 (7) | 15 (9) | 13 (7) | 14 (8) | 13 (7) | 13 (5) |
| Non-injured leg (Nm) | 21 (9) | 17 (8) | 16 (9) | 14 (6) | 10 (4) | 13 (9) | 11 (6) | 14 (6) |
| Outcome | Difference within groups | Difference between groups | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Week 5 minus pre-surgery | Week 12 minus pre-surgery | Week 26 minus pre-surgery | Week 5 minus pre-surgery | Week 12 minus pre-surgery | Week 26 minus pre-surgery | ||||
| Exp | Con | Exp | Con | Exp | Con | Exp-Con | Exp-Con | Exp-Con | |
| Eccentric 60°/s | |||||||||
| Reconstructed leg (Nm) | 8 (12)† | 5 (16) | 0 (11) | − 5 (16) | − 6 (12) | − 10 (15)† | 4 (− 5 to 12) | 5 (− 4 to 14) | 5 (− 4 to 13) |
| Non-injured leg (Nm) | − 4 (9)† | − 2 (11) | − 6 (9)† | -4 (12) | − 5 (9)† | − 7 (12)† | − 2 (− 8 to 4) | − 2 (− 8 to 4) | 2 (− 4 to 9) |
| Isometric | |||||||||
| Reconstructed leg (Nm) | 0 (1) | 0 (1) | − 1 (1)† | − 1 (1)† | − 1 (1)† | − 1 (1)† | 0 (0 to 1) | 0 (− 1 to 1) | 0 (− 1 to 1) |
| Non-injured leg (Nm) | 0 (2) | 0 (1) | − 1 (2) | 0 (1) | 0 (2) | − 1 (1)† | 0 (− 1 to 1) | 0 (− 1 to 1) | 1 (0 to 2) |
| Concentric 60°/s | |||||||||
| Reconstructed leg (Nm) | − 1 (8) | − 3 (10) | − 3 (8) | − 4 (10) | − 3 (9) | − 5 (10) | 2 (− 4 to 7) | 1 (− 4 to 7) | 2 (− 3 to 8) |
| Non-injured leg (Nm) | − 5 (9) | − 2 (10) | − 11 (9)† | − 4 (10) | − 10 (9)† | − 3 (10) | − 2 (− 8 to 3) | − 7 (− 12 to 1) | − 7 (− 12 to − 1) |
Mean (SD) of each group, mean (SD) difference within each group, and mean (95% CI) difference between groups
Force variability was quantified by the SD of the produced force divided by the mean force (i.e., coefficient of variation)
Exp experimental group, Con control group
†Different compared to pre-surgery (p < 0.05)