Sacco et al Foot-Core Training to Prevent Running-Related Injuries Am J Sports Med Running volume Appendix Figure A1. Monthly running volume average for 12 months for the Control and Intervention groups in kilometers. Bars represent standard deviation at each month. Running Shoes Appendix Table A1. Means, standard deviations and p-values (t-tests) of comparisons between groups of the participants' running shoes' characteristics for heel-to-toe drop distance, heel stack height and shoe mass. Effect sizes were calculated as Cohen d. Control Group Intervention Group p-value (t-test) Effect Size Heel-to-toe drop (mm) 9.74±1.18 9.66±1.81 0.819 0.053 Heel stack height (mm) 27.99±4.77 29.75±4.77 0.164 0.369 Shoe mass (g) 288.80±41.38 284.00±44.27 0.684 0.112