Title page for ETD etd-08222002-112844


Type of Document Master's Thesis
Author Davis, Thomas Wayne
Author's Email Address thdavis@vt.edu
URN etd-08222002-112844
Title The Effects of Age on Stress and The Biomechanics of Slips and Falls
Degree Master of Science
Department Industrial and Systems Engineering
Advisory Committee
Advisor Name Title
Lockhart, Thurmon E. Committee Chair
Roberto, Karen A. Committee Member
Smith-Jackson, Tonya L. Committee Member
Keywords
  • Heel Contact Velocity
  • Stress
  • Required Coefficient of Friction
  • Anxiety
  • Step Length
Date of Defense 2002-08-15
Availability restricted
Abstract
Research has shown that older adults who have experienced a previous fall are 60-70% more likely to suffer future falls. A study was conducted to investigate if stress and anxiety associated with a fear of falling contributes to the increased incidents of falls among older adults. The investigation compared physiological parameters, with biomechanical parameters of walking for twenty-eight participants in two age groups: (18-35) and (65 or older). Both age groups were evaluated while walking over dry and slippery floor surfaces. Biomechanical parameters included: step length, required coefficient of friction (RCOF), slip distance, and heel contact velocity. Physiological parameters included: stress and anxiety.

Overall, the results indicated that there were differences between older and younger adult's biomechanical parameters of walking, and their physiological stress and anxiety associated with an inadvertent slip. Younger adult's normal RCOF was higher and their normal step length was longer compared to older adults. Older adult's stress level after a slip was significantly higher than younger adults. However, younger and older adult's anxiety scores were not significantly different. Furthermore, younger and older adults modified their step length differently to avoid slipping, when walking over the slippery floor surface. It was concluded that some anxiety and stress may be beneficial in reducing the occurrence of inadvertent slips and falls due to an increased awareness of one's external environment.

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