Table 4. Relative and absolute reliability of concentric extension and flexion of the knee in isokinetic.
| Knee action evaluated | Speed (°/s) | Mean /(SD) 1° test | Mean /(SD) 2° test | Mean /(SD) 3° test | ICC (95% CI) | SEM (Nm) | SEM (%) | SRD (Nm) | SRD (%) |
|---|---|---|---|---|---|---|---|---|---|
| CONCENTRIC | |||||||||
| EXTENSION | |||||||||
| Fagher et al. (2016)[4] | 60 | 47.8 (13.1) | 51.0 (13.0) | - | 0.81 (0.58–0.92) | 5.5 | 11.1 | 15.3 | 30.9 |
| 180 | 34.5 (9.6) | 38.4 (7.9) | - | 0.68 (0.30–0.86) | 4.5 | 12.4 | 12.6 | 34.4 | |
| Johnsen et al. (2015)[12] | 60 | DL 104.0 (15.7) | DL 106.3 (15.4) | - | 0.87 (0.73–0.94) | 5.5 | 5.2 | 15.2 | 14.4 |
| NDL 101.9 (17.4) | NDL 106.7 (15.8) | - | 0.85 (0.62–0.94) | 5.6 | 5.4 | 15.5 | 14.9 | ||
| Santos et al. (2013)[2] | 60 | DL 139.5 (36.8) | DL 139.8 (44.2) | - | 0.87 | 15.8 | 11.2 | - | - |
| NDL 137.5 (34.8) | NDL 138.3 (49.3) | - | 0.81 | 16.3 | 11.8 | - | - | ||
| Moreau et al. (2008)[10] | 60 | 39.24 (20.42) | 37.42 (16.32) | - | 0.95 | - | - | - | - |
| Pierce et al. (2006)[20] | 15 | 2.4 (1.6) | 2.1 (1.7) | - | 0.51 | - | - | - | - |
| 90 | 7.1 (5.0) | 5.2 (3.8) | - | 0.50 | - | - | - | - | |
| 180 | 13.5 (9.8) | 10.6 (9.8) | - | 0.86 | - | - | - | - | |
| Merlini et al. (1995)[3] | 100 | 40.1 (12.0) | 41.2 (15.0) | 40.4 (15.6) | 0.95 | - | - | - | - |
| 41.6 (13.4) | 41.0 (15.3) | 41.4 (14.1) | 0.95 | - | - | - | - | ||
| Kellis et al. (1999)[11] | 60 | DL 100.9 (12.3) | DL98.1 (12.1) | - | 0.98 | - | - | - | - |
| 120 | DL 87.2 (12.1) | DL 85.1 (12.6) | - | 0.96 | - | - | - | - | |
| 180 | DL 74.7 (10.9) | DL 74.3 (11.9). | - | 0.89 | - | - | - | - | |
| 60 | NDL 98.8 (14.1) | NDL 9.5 (16.0) | - | 0.96 | - | - | - | - | |
| 120 | NDL 86.3 (13.0) | NDL 85.6 (14.0) | - | 0.93 | - | - | - | - | |
| 180 | NDL 71.8 (12.2) | NDL 73.1 (12.7) | - | 0.94 | - | - | - | ||
| Iga et al. (2006)[5] | 1.08 rad/s | DL 159 (42) | DL 161 (44) | - | - | - | - | - | - |
| 2.16 rad/s | DL 133 (32) | DL 139 (35) | - | - | - | - | - | - | |
| 4.32 rad/s | DL 106 (33) | DL 111 (34) | - | - | - | - | - | - | |
| 1.08 rad/s | NDL 154 (44) | NDL 160 (47) | - | - | - | - | - | - | |
| 2.16 rad/s | NDL 128 (29) | NDL 163 (34) | - | - | - | - | - | - | |
| 4.32 rad/s | NDL 103 (26) | NDL 109 (29) | - | - | - | - | - | ||
| Ayalon et al. (2000)[27] | 90 | 30.52 (2.76) | 30.39 (2.93) | - | 0.98–0.99 | - | - | - | - |
| Van den Berg-Emons et al. (1996)[21] | 30 | 41.3 (15.7) | 39.5 (16.7) | - | - | - | - | - | - |
| 60 | 39.4 (19.5) | 39.8 (17.4) | - | - | - | - | - | - | |
| 120 | 27.1 (9.7) | 30.8 (12.8) | - | - | - | - | - | - | |
| FLEXION | |||||||||
| Fagher et al. (2016)[4] | 60 | 26.0 (5.5) | 27.7 (6.2) | - | 0.62 (0.28–0.82) | 3.5 | 13.1 | 9.8 | 36.5 |
| 180 | 20.4 (4.3) | 23.9 (5.4) | 0.49 (0.03–0.77) | 3.1 | 13.9 | 8.5 | 38.5 | ||
| Johnsen et al. (2015)[12] | 60 | DL 54.3 (11.0) | DL 55.1 (9.2) | - | 0.81 (0.63–0.91) | 4.4 | 8.1 | 12.2 | 22.3 |
| NDL 52.5 (10.5) | NDL 53.4 (9.0) | - | 0.77 (0.55–0.89) | 4.7 | 8.9 | 13.0 | 24.6 | ||
| Santos et al. (2013)[2] | 60 | DL 106.9 (21.6) | DL 112.5 (29.1) | - | 0.82 | 25.0 | 17.3 | - | - |
| NDL 113.9 (30.2) | NDL 118.0 (33.6) | - | 0.79 | 15.0 | 12.8 | - | - | ||
| Moreau et al. (2008)[10] | 60 | 18.18 (14.57) | 18.21 (13.63) | - | 0.96 | - | - | - | - |
| Pierce et al. (2006)[20] | 15 | 0.2 (1.0) | 0.7 (1,3) | - | 0.31 | - | - | - | - |
| 90 | 1.1 (2.0) | 1.3 (1.4) | - | 0.38 | - | - | - | - | |
| 180 | 6.1 (4.0) | 4.8 (3.3) | - | 0.80 | - | - | - | - | |
| Merlini et al. (1995)[3] | 100 | 25.2 (8.7) | 26.9 (8.3) | 26.9 (7.5) | 0.85 | - | - | - | - |
| 27.3 (7.7) | 26.7 (9.0) | 26.6 (8.4) | 0.85 | - | - | - | - | ||
| Kellis et al. (1999)[11] | 60 | DL 64.5 (12.1) | DL 66.8 (8.8) | - | DL 0.90 | - | - | - | - |
| 120 | DL 59.5 (11.2) | DL 61.8 (8.4) | - | DL 0.88 | - | - | - | - | |
| 180 | DL 50.5 (11.5) | DL 53.6 (9.1) | - | DL 0.89 | - | - | - | - | |
| 60 | NDL 61.1 (9.0) | NDL 63.5 (10.6) | - | NDL 0.95 | - | - | - | - | |
| 120 | NDL 55.2 (9.5) | NDL 60.0 (11.2) | - | NDL 0.86 | - | - | - | - | |
| 180 | NDL 45.5 (11.1) | NDL 49.9 (6.7) | - | NDL 0.81 | - | - | - | - | |
| Iga et al. (2006)[5] | 1,08 rad/s | DL 87 (24) | DL 92 (28) | - | - | - | - | - | - |
| 2,16 rad/s | DL 79 (20) | DL 85 (25) | - | - | - | - | - | - | |
| 4,32 rad/s | DL 71 (17) | DL 73 (19) | - | - | - | - | - | - | |
| 1,08 rad/s | NDL 84 (22) | NDL 89 (25) | - | - | - | - | - | - | |
| 2,16 rad/s | NDL 75 (19) | NDL 77 (20) | - | - | - | - | - | - | |
| 4,32 rad/s | NDL 68 (19) | NDL 67 (17) | - | - | - | - | - | ||
| Ayalon et al. (2000)[27] | 90 | 14.69 (2.13) | 16.41 (3.08) | - | ICC 0.95–0.98 | - | - | - | - |
| Van den Berg-Emons et al. (1996)[21] | 30 | 23.7 (9.1) | 21.9 (10.0) | - | - | - | - | - | - |
| 60 | 21.2 (10.1) | 20.2 (8.8) | - | - | - | - | - | - | |
| 120 | 18.3 (8.2) | 19.0 (7.8) | - | - | - | - | - | - | |
ICC = intraclass correlation coefficient (95% Confidence Interval); SEM = standard error of measurement; SRD = smallest real difference; DL = dominant leg; NDL = non dominant leg.