Gender difference in older adult's utilization of gravitational and ground reaction force in regulation of angular momentum during stair descent

Kunal Singhal, Jemin Kim, Jeffrey Casebolt, Sangwoo Lee, Ki Hoon Han, Young Hoo Kwon

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Angular momentum of the body is a highly controlled quantity signifying stability, therefore, it is essential to understand its regulation during stair descent. The purpose of this study was to investigate how older adults use gravity and ground reaction force to regulate the angular momentum of the body during stair descent. A total of 28 participants (12 male and 16 female; 68.5. years and 69.0. years of mean age respectively) performed stair descent from a level walk in a step-over-step manner at a self-selected speed over a custom made three-step staircase with embedded force plates. Kinematic and force data were used to calculate angular momentum, gravitational moment, and ground reaction force moment about the stance foot center of pressure. Women show a significantly greater change in normalized angular momentum (0.92. Nms/Kgm; p=. .004) as compared to men (0.45. Nms/Kgm). Women produce higher normalized GRF (. p=. .031) during the double support phase. The angular momentum changes show largest backward regulation for Step 0 and forward regulation for Step 2. This greater difference in overall change in the angular momentum in women may explain their increased risk of fall over the stairs.

Original languageEnglish (US)
Pages (from-to)230-239
Number of pages10
JournalHuman Movement Science
Volume41
DOIs
StatePublished - Jun 1 2015
Externally publishedYes

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Gravitation
Biomechanical Phenomena
Foot
Pressure

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology

Cite this

Gender difference in older adult's utilization of gravitational and ground reaction force in regulation of angular momentum during stair descent. / Singhal, Kunal; Kim, Jemin; Casebolt, Jeffrey; Lee, Sangwoo; Han, Ki Hoon; Kwon, Young Hoo.

In: Human Movement Science, Vol. 41, 01.06.2015, p. 230-239.

Research output: Contribution to journalArticle

Singhal, Kunal ; Kim, Jemin ; Casebolt, Jeffrey ; Lee, Sangwoo ; Han, Ki Hoon ; Kwon, Young Hoo. / Gender difference in older adult's utilization of gravitational and ground reaction force in regulation of angular momentum during stair descent. In: Human Movement Science. 2015 ; Vol. 41. pp. 230-239.
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