Human walks carefully when the ground dynamic coefficient of friction drops below 0.41 |
| |
| Authors: | Daniel Tik-Pui Fong Youlian Hong Jing-Xian Li |
| |
| Institution: | aDepartment of Sports Science and Physical Education, Faculty of Education, The Chinese University of Hong Kong, Shatin, Hong Kong, China;bDepartment of Orthopaedics and Traumatology, Prince of Wales Hospital, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong, China;cSchool of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ontario, Canada |
| |
| Abstract: | This study investigated the available and utilized friction during non-slip gait in level walking, and determined the limit which human starts to walk carefully to adapt to slippery surface. Sixteen floor–footwear-contaminant conditions with different slipperiness (dynamic coefficient of friction, DCOF, from 0.11 to 1.06) were employed. Fifteen harnessed Chinese male performed ten self-paced walking trials in each condition without slips. The utilized friction (COFu) was obtained from the maximum value of shear to normal ground reaction force ratio during the first 25% stance. ANOVA and Tukey tests showed three subsets with similar COFu, and confirmed the hypothesis that the utilized friction drops gradually when the available friction drops below a certain critical limit. Non-linear regression models were applied to the data to determine the COFu to be 0.20 and the limit of available ground friction which human starts to walk carefully to adapt to slippery surface (DCOFlimit) to be 0.41. |
| |
| Keywords: | Slips and falls Injury prevention Slipping risk Coefficient of friction Preventive measures to slips |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
