Maximum opening Comfortable opening
F P Post hoc F P Post hoc
Peak head lateral flexion 0.29 0.754 N/A 1.1 0.335 N/A
Peak head flexion/extension 1.91 0.171 N/A 0.11 0.865 N/A
Peak head rotation 1.97 0.017 N/A 0.97 0.377 N/A
Peak head translation anterior/posterior 1.42 0.263 N/A 1.97 0.016 N/A
Peak head translation left/right 1.4 0.267 N/A 0.68 0.467 N/A
Peak head translation superior/inferior 15.17 0.001a N > S, U > S 10.62 0.003a N > S, U > S

aSignificant ANOVA results at the corrected alpha level of P = 0.0033.
N/A = not applicable; N = neutral posture, U = upright posture, S = slumped posture; F = F statistic from ANOVA; P = P-value from ANOVA.