Table 2. Running velocities and peak ankle plantar-flexor torques for novice barefoot runners, pre- and post-exertion. Data are means (±SD).
RFS MFS FFS
Pre-Exertion Post-Exertion Pre-Exertion Post-Exertion Pre- Exertion Post-Exertion
Velocity (m.s-1) 3.5 (.5) 3.6 (.5) 3.6 (.4) 3.6 (.4) 3.7 (.4) 3.7 (.4)
Peak Torque (Nm) 106(32) 93(34)* 89(16) 78(13)* 90(23) 72(20)*
p-value .001 <0.001 < 0.001
Cohen’s d Effect Size 4.93 2.53 10.54
Confidence Interval 10.40 – 15.96 9.53 – 17.17 15.45-19.56
RFS= rear-foot strike ; MFS = mid-foot strike; FFS = forefoot-strike. There were significant differences between RFS runners and both, MFS and FFS runners, for peak ankle plantar-flexor torque. P-values, effect sizes, and confidence intervals are presented for significant within-group differences.