Biomechanical Factors On Runners With A History Of Shin Splints

Prior studies on Shin Splints have primarily focused on the kinematic factors underlying the condition. However, research on the kinetics of shin splints has been limited. It is a crucial factor to consider because the lower extremity biomechanics depend on the principle of the kinematic chain, where each joint segment is connected and transfers forces and motions to its neighboring joint. PUPROSE: The purpose of the study was to compare the kinematic and kinetic differences between runners that have experienced shin splints and runners that have never experienced shin splints during running. METHODOLOGY: Participants were separated into two groups, those with a history of shin splints and those without a history of shin splints. 12 participants experienced shin splints(SS) and 8 participants had no history of shin splints(NSS). Data collection occurred during one session where markers were placed on the lower extremity and ran on a flat instrumented treadmill for 5 minutes, with data collected during the final minute of the run. Peak values of kinematic and kinetic variables were analyzed using MANOVA (α = 0.05). RESULTS: Results showed a narrower stride width for SS (.08 + 0.03 vs NSS 0.14 + 0.01 m, p < .01). SS also had a shorter stride length (1.73 + 0.22 vs 2.27 + 0.10 m, p = .01) SS had a higher average steps per minute (80.9 + 4.77 vs 72.6 + 1.74 spm, p = 0.01). Peak ground reaction force was greater SS (2.29 + 0.18 vs 2.04 + 0.03 N/kg, p = 0.03). NSS has a greater knee extension moment (2.40 + 0.18 vs 2.01 + 0.35 Nm/kg, p = 0.03). SS had a greater peak hip flexion moment (1.36 + 0.23 vs 1.06 + 0.10 Nm/kg, p = 0.018). NSS had a larger hip range of motion (59.89 + 0.66 vs 35.96 + 6.25, p < 0.01). CONCLUSIONS: The study's findings are consistent with previous research and suggest that SS runners may have altered biomechanics that contribute to the development of this condition.