Slip resistance of running shoes with varying tread patterns on common tracks

Slips and falls occur due to inadequate slip resistance from running shoes on track surfaces, leading to injuries. To address this, the current study evaluated the slip resistance of eighteen commonly used running shoes on two different track surfaces under controlled slipping conditions. Shoe outsoles were replicated using thermoplastic polyurethane to assess the slip resistance performance on common surfaces such as ethylene propylene diene monomer (EPDM) and synthetic material-based track surfaces. Slip resistance was quantified using a robotic biofidelic slip testing device, which measured the available coefficient of friction (ACOF). The results showed that the synthetic surface provided better resistance. Furthermore, a correlation between ACOF and apparent contact area was also analysed. Shoes with modified hexagonal or block-based tread designs and radial tread grooves demonstrated the highest ACOF. It is expected that this research will assist runners in selecting shoes that enhance their performance and reduce slip-related injuries.