Title page for ETD etd-06232008-162913


Type of Document Master's Thesis
Author Whitley, Michael James
Author's Email Address mwhitley@vt.edu
URN etd-06232008-162913
Title Maximum Absolute and Relative Joint Torques during Recovery from a Simulated Trip
Degree Master of Science
Department Biomedical Engineering and Sciences
Advisory Committee
Advisor Name Title
Madigan, Michael L. Committee Chair
Davy, Kevin P. Committee Member
Nussbaum, Maury A. Committee Member
Keywords
  • trip
  • obese
  • joint torques
  • fall
Date of Defense 2008-06-20
Availability unrestricted
Abstract
Previous studies have shown that obesity negatively affects balance during quiet standing, yet little is known about its effect on the ability to recover after a postural perturbation. The purpose of this thesis was to investigate the effects of obesity on single-step balance recovery from an incipient forward fall. Eight obese (BMI = 33.2 ± 2.4) and eight non-obese (BMI = 24.8 ± 1.8) participants were released from a static forward lean and asked to recover their balance with a single step. Lean angle was progressively increased until they could no longer recover balance with a single step. Peak joint torques and relative effort during balance recovery were calculated and compared across the groups. Obese participants achieved a smaller maximum lean angle compared to non-obese participants. During balance recovery, obese participants exhibited higher ankle plantar flexor torques and relative effort. Trends also suggested higher relative hip extensor effort in the obese. Obese adults exhibited a poorer ability to recover from a forward fall with a single step. In addition, obese adults used a higher percentage of their total hip and ankle strength compared to non-obese adults during balance recovery. This suggests that the poorer ability of recovering from a forward fall in the obese may be related to increased exertion levels during balance recovery.
Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  MJWhitley_Thesis_Resubmit.pdf 498.14 Kb 00:02:18 00:01:11 00:01:02 00:00:31 00:00:02

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.