| 
  
    | Table 2. Test-retest reliability of rate of force development, rate of relaxation, % change in RFD, % change in RR and % change in RR ½. |  
    | 
|  | t test | 95% CI | 95% CI | Bias | Random Error | ICC [3,1] | ICC CI Lower | ICC CI Upper |  
| Fatigue Index | -.26 | -10.27 | 8.37 | -.95 | 17.4 | .87 | .34 | .98 |  
| % Change in RFD | -.56 | -14.30 | 8.95 | 11.60 | 62.2 | .72 | .02 | .95 |  
| % Change in RR | .30 | -23.00 | 29.5 | 3.26 | 55.7 | .14 | -.63 | .77 |  
| % Change in RR ½ | -1.06 | -2.58 | 1.01 | -.37 | 1.00 | .92 | .60 | .99 |  |  
  
    | ICC = intraclass correlation coefficient, RFD = rate of force development, RR = rate of relaxation. |  |