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. 2023 Dec 19;9(1):1. doi: 10.3390/jfmk9010001

Table 2.

Intra-day reliability statistics reporting Cronbach’s α for both ICC single and average measures and 95% confidence intervals (CI) for 0.025, 0.050, 0.075, and 0.100 kg·m2 flywheel Romanian deadlift mean power outputs between complete sets over 4 familiarization testing sessions for the internal and external attentional focus groups.

Internal Group
Inertial Load Cronbach’s α Single Measure 95% CI Average Measure 95% CI
0.025 kg·m2 (Day 1) 0.97 0.93 0.78–0.99 0.98 0.92–1.00
0.025 kg·m2 (Day 2) 0.94 0.79 0.44–0.96 0.92 0.70–0.98
0.025 kg·m2 (Day 3) 0.97 0.83 0.34–0.97 0.94 0.61–0.99
0.025 kg·m2 (Day 4) 0.99 0.96 0.87–0.99 0.99 0.95–1.00
0.050 kg·m2 (Day 1) 0.98 0.95 0.82–0.99 0.98 0.93–1.00
0.050 kg·m2 (Day 2) 0.87 0.72 0.29–0.94 0.88 0.54–0.98
0.050 kg·m2 (Day 3) 0.88 0.72 0.32–0.94 0.89 0.59–0.98
0.050 kg·m2 (Day 4) 0.95 0.86 0.60–0.97 0.95 0.82–0.99
0.075 kg·m2 (Day 1) 0.91 0.78 0.42–0.95 0.92 0.68–0.98
0.075 kg·m2 (Day 2) 0.83 0.65 0.17–0.92 0.85 0.39–0.97
0.075 kg·m2 (Day 3) 0.67 0.35 −0.38–0.80 0.62 −0.13–0.92
0.075 kg·m2 (Day 4) 0.95 0.87 0.62–0.97 0.95 0.83–0.99
0.100 kg·m2 (Day 1) 0.86 0.68 0.27–0.93 0.87 0.52–0.98
0.100 kg·m2 (Day 2) 0.71 0.48 −0.30–0.87 0.73 −0.96–0.95
0.100 kg·m2 (Day 3) 0.95 0.88 0.64–0.98 0.96 0.84–0.99
0.100 kg·m2 (Day 4) 0.97 0.92 0.75–0.98 0.97 0.90–1.00
External Group
Inertial load Cronbach’s α Single Measure 95% CI Average Measure 95% CI
0.025 kg·m2 (Day 1) 0.97 0.92 0.74–0.99 0.97 0.89–1.00
0.025 kg·m2 (Day 2) 0.96 0.89 0.67–0.98 0.96 0.85–0.99
0.025 kg·m2 (Day 3) 0.98 0.95 0.85–0.99 0.98 0.94–1.00
0.025 kg·m2 (Day 4) 0.99 0.97 0.88–0.99 0.99 0.96–1.00
0.050 kg·m2 (Day 1) 0.96 0.90 0.69–0.98 0.96 0.87–0.99
0.050 kg·m2 (Day 2) 0.96 0.89 0.67–0.98 0.96 0.86–0.99
0.050 kg·m2 (Day 3) 0.96 0.89 0.68–0.98 0.96 0.87–0.99
0.050 kg·m2 (Day 4) 0.98 0.94 0.81–0.99 0.98 0.93–1.00
0.075 kg·m2 (Day 1) 0.96 0.89 0.67–0.98 0.96 0.86–0.99
0.075 kg·m2 (Day 2) 0.97 0.93 0.75–0.99 0.97 0.90–1.00
0.075 kg·m2 (Day 3) 0.98 0.95 0.83–0.99 0.98 0.94–1.00
0.075 kg·m2 (Day 4) 0.95 0.88 0.64–0.98 0.96 0.84–0.99
0.100 kg·m2 (Day 1) 0.93 0.81 0.49–0.96 0.93 0.74–0.99
0.100 kg·m2 (Day 2) 0.95 0.85 0.59–0.97 0.95 0.81–0.99
0.100 kg·m2 (Day 3) 0.98 0.96 0.85–0.99 0.98 0.94–1.00
0.100 kg·m2 (Day 4) 0.95 0.86 0.60–0.97 0.95 0.82–0.99