Table 1.
Results.
| Test 1 Mean (SD) |
Test 2 Mean (SD) |
Change in Means (SD) |
Analysis: Original Units Model ICC or CCC (95% CI) SEM Where Applicable |
Analysis: Arcsin Scale Units Model ICC (95% CI) |
|||
|---|---|---|---|---|---|---|---|
| Twitch contraction time (CT) | |||||||
| Resting twitch CT (s) | 0.156 (0.036) |
0.147 (0.026) |
0.010 (0.026) |
||||
| Superimposed twitch CT (s) | 0.063 (0.039) |
0.057 (0.041) |
0.000 (0.020) |
||||
| Superimposed twitch CT end task | 0.087 (0.025) |
0.074 (0.039) |
0.013 (0.025) |
||||
| Resting twitch CT end task | 0.131 (0.023) |
0.132 (0.021) |
−0.001 (0.015) |
||||
| Twitch amplitudes | |||||||
| Resting twitch amplitude (N) | 26.87 (9.63) |
27.64 (10.53) |
−0.77 (9.34) |
Gaussian ICC = 0.57 (0.07, 0.86) SEM = 6.6 |
|||
| Superimposed twitch amplitude (N) | 4.21 (5.18) |
3.94 (4.68) |
0.27 (3.36) |
Non-parametric CCC = 0.77 (0.38, 0.93) |
Gaussian ICC = 0.83 (0.55, 0.95) |
||
| Superimposed twitch amplitude end task (N) | 7.93 (6.65) |
7.59 (7.18) |
0.35 (7.03) |
Gamma ICC = 0.35 (0.05, 0.45) |
Gaussian ICC = 0.65 (0.19, 0.88) |
||
| Resting twitch amplitude end task (N) | 25.28 (9.64) |
26.47 (10.22) |
−1.19 (7.30) |
Gaussian ICC = 0.73 (0.31, 0.92) SEM = 5.16 |
|||
| Voluntary activation (VA) | |||||||
| VAITT (%) | 84.6 (19.4) |
85.1 (20.1) |
−0.50 (11.21) |
Gamma ICC = 0.62 (0.25, 0.74) |
Gaussian ICC = 0.82 (0.53, 0.94) |
||
| VAAdj_ITT (%) | 86.2 (18.1) |
87.5 (15.9) |
−1.32 (9.60) |
Gamma ICC = 0.62 (0.30, 0.74) |
Gaussian ICC = 0.82 (0.51, 0.94) |
||
| VACAR (%) | 96.2 (6.1) |
96.1 (6.5) |
0.16 (1.88) |
Gamma ICC = 0.82 (0.63, 0.91) |
Gaussian ICC = 0.92 (0.77, 0.98) |
||
| VAITT end task (%) | 70.9 (18.8) |
71.3 (32.1) |
−0.34 (28.98) |
Non-parametric CCC = 0.39 (−0.11, 0.74) |
Arcsin transformation not possible | ||
| VACAR end task (%) | 90.5 (11.6) |
88.3 (16.1) |
2.21 (16.71) |
Gamma ICC = 0.33 (−0.23, 0.51) |
Gaussian ICC = 0.48 (0.00, 0.82) |
||
| Central fatigue (CF) | |||||||
| CFITT (%) | 13.7 (22.4) |
13.8 (20.0) |
−0.16 (33.05) |
Non-parametric CCC = −0.22 (−0.68, 0.38) |
Arcsin transformation not possible | ||
| CFCAR (%) | 5.7 (12.3) |
7.8 (10.7) |
−2.05 (16.60) |
Non-parametric CCC = −4.1 (−0.57, 0.51) |
Arcsin transformation not possible | ||
SEM = standard error of measurement; CT = contraction time; VAITT = voluntary activation calculated using ITT method; VAAdj_ITT = voluntary activation calculated using adjusted ITT method; VACAR = voluntary activation calculated using CAR method, CFITT= central fatigue calculated using ITT method; CFCAR = central fatigue calculated using CAR method.