Table 2. Within-subject coefficient of variation (CV) with 95% confidence intervals obtained at each relative load for each velocity variable and regression model.
| Load (%1RM) | Mean velocity | Mean propulsive velocity | Peak velocity | |||
|---|---|---|---|---|---|---|
| Linear | Polynomial | Linear | Polynomial | Linear | Polynomial | |
| 20 | 2.85 (2.14, 4.27)*,b,c | 3.73 (2.80, 5.59)b | 3.45 (2.59, 5.18)* | 4.79 (3.59, 7.18) | 3.62 (2.71, 5.42) | 3.82 (2.87, 5.73)b |
| 25 | 2.77 (2.08, 4.16)*,b,c | 3.25 (2.44, 4.87)b | 3.35 (2.51, 5.02)* | 4.13 (3.10, 6.19) | 3.59 (2.70, 5.39) | 3.67 (2.76, 5.50) |
| 30 | 2.71 (2.03, 4.06)b,c | 2.90 (2.17, 4.34)b,c | 3.24 (2.43, 4.86) | 3.60 (2.70, 5.40) | 3.57 (2.68, 5.35) | 3.60 (2.70, 5.40) |
| 35 | 2.64 (1.98, 3.96)b,c | 2.73 (2.05, 4.09)b,c | 3.14 (2.35, 4.70) | 3.25 (2.44, 4.87) | 3.55 (2.66, 5.32) | 3.62 (2.72, 5.43) |
| 40 | 2.59 (1.95, 3.89)b,c | 2.76 (2.07, 4.14)c | 3.04 (2.28, 4.55)c | 3.12 (2.34, 4.67)c | 3.53 (2.65, 5.29) | 3.72 (2.79, 5.58) |
| 45 | 2.56 (1.92, 3.84)*,b,c | 2.98 (2.23, 4.46)c | 2.95 (2.21, 4.42)c | 3.20 (2.40, 4.80)c | 3.51 (2.63, 5.26) | 3.87 (2.91, 5.81) |
| 50 | 2.55 (1.91, 3.82)*,c | 3.31 (2.49, 4.97)c | 2.88 (2.16, 4.31)*,c | 3.46 (2.60, 5.19)c | 3.50 (2.63, 5.24)* | 4.06 (3.05, 6.09) |
| 55 | 2.58 (1.93, 3.86)*,c | 3.71 (2.78, 5.56) | 2.84 (2.13, 4.25)*,c | 3.82 (2.86, 5.72) | 3.50 (2.62, 5.24)* | 4.26 (3.19, 6.38) |
| 60 | 2.65 (1.99, 3.98)*,c | 4.10 (3.08, 6.15) | 2.84 (2.13, 4.26)*,c | 4.20 (3.15, 6.30) | 3.51 (2.63, 5.26)* | 4.42 (3.32, 6.63) |
| 65 | 2.79 (2.10, 4.19)*,c | 4.46 (3.35, 6.69) | 2.91 (2.18, 4.36)*,c | 4.56 (3.42, 6.83) | 3.54 (2.66, 5.31)* | 4.53 (3.40, 6.79) |
| 70 | 3.02 (2.26, 4.52)*,c | 4.74 (3.56, 7.11) | 3.07 (2.30, 4.60)*,c | 4.84 (3.63, 7.26) | 3.60 (2.70, 5.40)* | 4.55 (3.41, 6.81) |
| 75 | 3.34 (2.51, 5.01)* | 4.92 (3.69, 7.38) | 3.35 (2.51, 5.02)* | 5.02 (3.77, 7.53) | 3.70 (2.78, 5.55)* | 4.44 (3.33, 6.65) |
| 80 | 3.79 (2.84, 5.68)* | 4.98 (3.73, 7.46) | 3.77 (2.83, 5.65)* | 5.07 (3.80, 7.60) | 3.87 (2.90, 5.80) | 4.20 (3.15, 6.29)a,b |
| 85 | 4.39 (3.30, 6.58) | 4.91 (3.68, 7.35) | 4.36 (3.27, 6.54) | 4.98 (3.74, 7.47) | 4.13 (3.10, 6.19) | 3.84 (2.88, 5.76)a,b |
| 90 | 5.19 (3.89, 7.77) | 4.76 (3.57, 7.14) | 5.18 (3.88, 7.76) | 4.82 (3.62, 7.23) | 4.52 (3.39, 6.78) | 3.53 (2.65, 5.28)*,a,b |
| 95 | 6.23 (4.67, 9.34) | 4.70 (3.53, 7.05)* | 6.26 (4.70, 9.39) | 4.77 (3.58, 7.15)* | 5.12 (3.84, 7.68)a,b | 3.62 (2.71, 5.42)*,a,b |
| 100 | 7.61 (5.71, 11.41) | 5.05 (3.79, 7.57)* | 7.72 (5.79, 11.57) | 5.25 (3.94, 7.87)* | 6.03 (4.52, 9.04)a,b | 4.59 (3.44, 6.88)* |
| All | 3.54 ± 1.49 | 4.00 ± 0.87 | 3.79 ± 1.37 | 4.29 ± 0.74 | 3.91 ± 0.70 | 4.02 ± 0.38 |
1RM, one-repetition maximum; All, CV value obtained from the full load-velocity relationship (mean ± standard deviation).
*, significantly more reliable than the other regression model
a, significantly more reliable than mean velocity
b, significantly more reliable than mean propulsive velocity
c, significantly more reliable than peak velocity. Significant differences in reliability were defined as a CV ratio > 1.15.