Table 1 Results of the linear regressions of each kinematics parameter against U for each gait and the z-test comparisons of the slope and intercept coefficients.

Walk

l _stride

0.142 + 0.204 U

(t = 9.287, r² = 0.65,

n = 48, p < 0.001)

0.102 + 0.246 U

(t = 5.319, r² = 0.96,

n = 3, p < 0.001)

−0.837

0.401

1.362

0.174

ƒ _stride

1.022 + 2.051 U

(t = 10.08, r² = 0.69,

n = 48, p < 0.001)

1.043 + 2.130

(t = 36.28, r² = 0.99,

n = 3, p < 0.001)

−0.372

0.711

−0.149

0.881

t _stance

−0.679–0.720 log₁₀ U

(t = −10.97, r² = 0.83,

n = 26, p < 0.001)

−0.646–0.623 log₁₀ U

(t = −7.368, r² = 0.98,

n = 3, p = 0.086)

−1.178

0.238

−1.217

0.222

t _swing

−0.879–0.184 log₁₀ U

(t = −2.30, r² = 0.18,

n = 26, p = 0.031)

−0.838–0.012 log₁₀ U

(t = −0.20, r² = 0.03,

n = 3, p = 0.88)

−1.688

0.091

−1.172

0.242

DF

0.814–0.230 U

(t = −6.21, r² = 0.62,

n = 25, p < 0.001)

0.858–0.281 U

(t = −6.72, r² = 0.98,

n = 3, p = 0.094)

0.930

0.352

−1.390

0.165

Grounded running

l _stride

0.260 + 0.088 U

(t = 3.74, r² = 0.21,

n = 56, p < 0.001)

0.194 + 0.158 U

(t = 7.934, r² = 0.95,

n = 5, p < 0.01)

−2.275

 < 0.05

—

—

ƒ _stride

0.979 + 1.925 U

(t = 9.55, r² = 0.63,

n = 56, p < 0.001)

1.621 + 1.258 U

(t = 5.728, r² = 0.92,

n = 5, p < 0.05)

2.238

 < 0.05

—

—

t _stance

−0.707–1.021log₁₀ U

(t = −9.91, r² = 0.78,

n = 30, p < 0.001)

−0.656–0.955 log₁₀ U

(t = −44.49, r² = 0.99,

n = 5, p < 0.001)

−0.845

0.593

—

—

t _swing

−0.833–0.392 log₁₀ U

(t = −3.53, r² = 0.31,

n = 30, p < 0.01)

−0.796 + 0.00 log₁₀ U

(t = 0, r² = 0.51,

n = 5, p = 0.167)

−3.529

<0.001

—

—

DF

0.689–0.122 U

(t = −4.47, r² = 0.42,

n = 30, p < 0.001)

0.734–0.164 U

(t = −18.18, r² = 0.99,

n = 5, p < 0.001)

1.479

0.139

—

—

Aerial Running

l _stride

0.144 + 0.162 U

(t = 11.54, r² = 0.69,

n = 61, p < 0.001)

0.247 + 0.131 U

(t = 2.484, r² = 0.75,

n = 4, p = 0.131)

0.552

0.582

—

—

ƒ _stride

2.947 + 0.665 U

(t = 5.27, r² = 0.32,

n = 61, p < 0.001)

1.788 + 1.078 U

(t = 3.12, r² = 0.82,

n = 4, p = 0.089)

−1.122

0.263

—

—

t _stance

−0.83–0.469 log₁₀ U

(t = −3.41, r² = 0.28,

n = 32, p < 0.01)

−0.698–0.723 log₁₀ U

(t = −3.32, r² = 0.85,

n = 4, p = 0.08)

0.983

0.327

—

—

t _swing

−0.855–0.136 log₁₀ U

(t = −1.20, r² = 0.04,

n = 32, p = 0.24)

−0.722–0.311 log₁₀ U

(t = −1.71, r² = 0.59,

n = 4, p = 0.23)

−0.636

0.522

—

—

DF

0.54–0.042 U

(t = −2.084, r² = 0.13,

n = 32, p = 0.045)

0.621–0.095 U

(t = −1.992, r² = 0.67,

n = 4, p = 0.185)

1.02

0.308

—

—