Table 1. Effect of shoe collar height on ankle angle at touchdown (θ¸0), maximum and minimum ankle angles (θ¸min and θ¸max), ankle range of motion (θ¸ROM), ankle angle excursion during the downward phase (∆θ¸), and the jump height (h) in the weight-bearing dorsiflexion (WB-DF) maneuver, drop jump (DJ), and lay-up jump (LJ) tasks.
Tasks Shoes θ¸0 (°) θ¸min (°) θ¸max (°) θ¸ROM (°) θ¸ (°) h (cm)
WB-DF HS N/A 85.0 ± 8.9* 112.8 ± 3.5 27. 0± 6.7* N/A N/A
LS N/A 77.1 ± 7.3 108.9 ± 4.8 32.2 ± 6.6 N/A N/A
Mean difference (95% CI) N/A 7.9
(4.7–11.1)
3.9
(.7–7.1)
-5.2
(-8.7–-1.7)
N/A N/A
Cohen’s d N/A .971 .928 .782 N/A N/A
Post-hoc power N/A 66.2% 62.3% 52.2% N/A N/A
DJ HS 125.6 ± 9.2 90.8 ± 11.2 140.7 ± 8.7 50.0 ± 9.3 34.7±7.9 .344 ± .054
LS 125.8 ± 6.1 88.1 ± 7.5 140.3 ± 8.1 52.1 ± 8.0 37.7±7.9 .342 ± .053
Mean difference (95% CI) -0.2
(-3.8–3.4)
2.1
(-2.5–6.7)
0.4
(-2.5–3.3)
-2.1
(-3.9–-0.3)
-3.0
(-6.3–0.3)
.002
(-.016–.020)
Cohen’s d .026 .283 .048 .242 .379 .037
Post-hoc power 2.9% 10.3% 3.3% 8.6% 15.2% 3.1%
LJ HS 117.8 ± 5.4 104.3 ± 7.2 136.2 ± 10.3 31.8 ± 8.1 13.6±5.8 .38 ± .05
LS 116.0 ± 6.0 103.6 ± 5.7 134.1 ± 10.6 30.6 ± 6.7 12.4±4.5 .41 ± .04
Mean difference (95% CI) 1.8
(.2–3.4)
.7
(-08–2.2)
2.1
(-.3–4.5)
1.2
(-.5–2.9)
1.2
(.1–2.3)
-0.03
(-.05–-.01)
Cohen’s d .315 .108 .201 .161 .231 .662
Post-hoc power 11.8% 4.5% 7.1% 5.9% 8.2% 36.9%
* Significantly different from LS (p < 0.05).