Table 2.
Effects of shoe collar height on peak ankle plantarflexion torque (Mmax), peak ankle plantarflexion power (Pmax), and ankle joint stiffness (k) during DJ and LJ tasks (normalized by body mass).
Tasks
Shoes
M
max
(N·m·kg
–1
)
P
max
(W·kg
–1
)
k
(N·m·kg
–1
/°)
DJ
HS
1.50 ± .65
9.93 ± 3.85
.045 ± .025
LS
1.37 ± .61
9.52 ± 3.55
.035 ± .014
Mean difference (95% CI)
.13
(-.05–.31)
.41
(.04–.77)
.010
(-.024–.044)
Cohen’s
d
.206
.111
.493
Post-hoc power
7.3%
4.6%
22.6%
LJ
HS
3.14 ± .65
*
13.11 ± 4.4
*
.265 ± .191
LS
4.19 ± .83
19.21 ± 7.0
.313 ± .255
Mean difference (95% CI)
-1.05
(-1.9–-.20)
-6.10
(-11.9–-.30)
-.048
(-.147–.0511)
Cohen’s
d
1.409
1.043
.213
Post-hoc power
93.2%
72.4%
7.5%
* Significantly different from LS (p < 0.05).