Table 3 Mixed-effect model of variation in ankle SNW with morphological and kinematic variables as fixed effects at sprint speed.

From: Shorter heels are linked with greater elastic energy storage in the Achilles tendon

Predictor variable

β

Statistic

p-value

Intercept

 − 0.002

F1,45 = 0.003

0.954

Ankle moment arm

0.229

F1,20 = 15.491

0.001

RAnkle

0.336

F1,45 = 7.074

0.011

Body mass

0.151

F1,20 = 0.536

0.473

Froude

0.191

F1,45 = 3.271

0.067

J

 − 0.236

F1,45 = 3.520

0.077

CSA

0.020

F1,20 = 0.001

0.976

  1. Bolded p-values indicate significant fixed-effect predictors. β are the partial regression coefficients (i.e., β-weights). CSA is the cross-sectional area of the AT. RAnkle is the mean external moment arm of the ground reaction force. J is the GRF impulse.
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