Fig. 4: Comparison of RMSE between rearfoot and non-rearfoot strike runners.

a–c Mid-stance phase, while d–f push-off phase. a, b, d, e Pearson correlation coefficients and Bland–Altman plots. c, f Box plots comparing the groups. Note: RMSE root mean square error, and M1–M5 indicate the first to fifth metatarsals. *p < 0.05, and **p < 0.01.