The long-term goal of this research, funded by NIOSH R01 and R03 grants, was to reduce slip and fall accidents in young and older adults, in the general population and occupational settings. Causes of slips and falls are numerous and complex. In this line of research, we focused on gait biomechanics – both gait style (or initial conditions at the onset of a slip) and postural recovery strategies after a slip was initiated. The impact of anticipating a slippery floor versus unexpected slips was also investigated. Findings were compared between young and older subjects, and between participants who were able to recover from a slip versus those who lost balance and fell. The results of this study provided a better understanding of the human factors that impact the risk of slips and falls. The use of this knowledge might improve fall prevention and training programs among older adults.