TABLE 4.
Reliability of repetition velocity in the squat.
| Variable and load | First vs. second testing session |
Second vs. third testing session |
Diff (95% CI) | ||||
| ICC (95% CI) | CV | SEM | ICC (95% CI) | CV | SEM | ||
| Peak velocity 30% 1RM | 0.82 (0.61, 0.92) | 3.90% | 0.08 (m/s) | 0.95 (0.88, 0.98) | 2.30% | 0.04 (m/s) | 0.13 (0.02, 0.39) |
| Mean velocity 30% 1RM | 0.80 (0.59, 0.91) | 4.70% | 0.06 (m/s) | 0.95 (0.89, 0.98) | 2.40% | 0.03 (m/s) | 0.15 (0.04, 0.36) |
| Peak power 30% 1RM | 0.97 (0.93, 0.99) | 5.00% | 137 (W) | 0.96 (0.90, 0.98) | 4.90% | 162 (W) | −0.01 (−0.09, 0.02) |
| Mean power 30% 1RM | 0.98 (0.95, 0.99) | 4.80% | 54 (W) | 0.99 (0.98, 1.00) | 2.80% | 34 (W) | 0.01 (0.00, 0.03) |
| Peak velocity 45% 1RM | 0.92 (0.81, 0.96) | 2.60% | 0.05 (m/s) | 0.91 (0.80, 0.96) | 2.50% | 0.05 (m/s) | −0.01 (−0.11, 0.07) |
| Mean velocity 45% 1RM | 0.87 (0.72, 0.95) | 3.30% | 0.04 (m/s) | 0.89 (0.76, 0.95) | 3.30% | 0.03 (m/s) | 0.02 (−0.10, 0.18) |
| Peak power 45% 1RM | 0.99 (0.97, 0.99) | 3.60% | 94 (W) | 0.98 (0.96, 0.99) | 3.50% | 105 (W) | 0.00 (−0.02, 0.01) |
| Mean power 45% 1RM | 0.99 (0.98, 1.00) | 3.00% | 38 (W) | 0.99 (0.97, 0.99) | 3.10% | 44 (W) | 0.00 (−0.04, 0.00) |
| Peak velocity 60% 1RM | 0.86 (0.70, 0.94) | 4.10% | 0.06 (m/s) | 0.87 (0.72, 0.94) | 3.50% | 0.06 (m/s) | 0.01 (−0.08, 0.08) |
| Mean velocity 60% 1RM | 0.92 (0.82, 0.97) | 3.10% | 0.03 (m/s) | 0.92 (0.82, 0.97) | 3.40% | 0.03 (m/s) | 0.00 (−0.08, 0.11) |
| Peak power 60% 1RM | 0.98 (0.95, 0.99) | 4.50% | 118 (W) | 0.97 (0.93, 0.99) | 4.80% | 140 (W) | −0.01 (−0.02, 0.00) |
| Mean power 60% 1RM | 0.98 (0.96, 0.99) | 3.40% | 46 (W) | 0.98 (0.96, 0.99) | 3.50% | 47 (W) | 0.00 (−0.01, 0.02) |
| Peak velocity 75% 1RM | 0.89 (0.75, 0.95) | 4.10% | 0.05 (m/s) | 0.91 (0.79, 0.96) | 3.40% | 0.05 (m/s) | 0.02 (−0.06, 0.13) |
| Mean velocity 75% 1RM | 0.89 (0.76, 0.95) | 3.80% | 0.03 (m/s) | 0.87 (0.72, 0.94) | 4.50% | 0.03 (m/s) | −0.02 (−0.14, 0.12) |
| Peak power 75% 1RM | 0.98 (0.96, 0.99) | 5.40% | 106 (W) | 0.97 (0.94, 0.99) | 5.20% | 128 (W) | −0.01 (−0.03, 0.02) |
| Mean power 75% 1RM | 0.98 (0.95, 0.99) | 4.30% | 48 (W) | 0.97 (0.93, 0.99) | 4.90% | 59 (W) | −0.01 (−0.04, 0.01) |
| Peak velocity 90% 1RM | 0.83 (0.64, 0.93) | 5.10% | 0.07 (m/s) | 0.83 (0.64, 0.93) | 4.80% | 0.06 (m/s) | 0.00 (−0.21, 0.07) |
| Mean velocity 90% 1RM | 0.78 (0.54, 0.90) | 6.70% | 0.04 (m/s) | 0.88 (0.74, 0.95) | 5.90% | 0.03 (m/s) | 0.10 (−0.01, 0.28) |
| Peak power 90% 1RM | 0.96 (0.90, 0.98) | 6.10% | 176 (W) | 0.96 (0.90, 0.98) | 5.60% | 165 (W) | 0.00 (−0.03, 0.03) |
| Mean power 90% 1RM | 0.94 (0.86, 0.98) | 6.90% | 78 (W) | 0.97 (0.92, 0.99) | 5.70% | 59 (W) | 0.02 (−0.01, 0.07) |
1RM, one-repetition maximum; CI, confidence interval; ICC, intraclass correlation coefficient; CV, coefficient of variation; SEM, standard error of measurement; Diff, difference between ICC (second vs. third testing) and ICC (first vs. second testing).