PMID- 29752052
OWN - NLM
STAT- MEDLINE
DCOM- 20190408
LR  - 20190408
IS  - 1873-2380 (Electronic)
IS  - 0021-9290 (Linking)
VI  - 74
DP  - 2018 Jun 6
TI  - Decrease in required coefficient of friction due to smaller lean angle during 
      turning in older adults.
PG  - 163-170
LID - S0021-9290(18)30339-7 [pii]
LID - 10.1016/j.jbiomech.2018.04.038 [doi]
AB  - We investigated age-related differences in the required coefficient of friction 
      (RCOF) during 90 degrees  turning, the difference of RCOF during step and spin turn, and 
      how affects observed differences. Sixteen healthy young and healthy older adults 
      (eight men and eight women in each group) participated. Participants performed 
      90 degrees  step and spin turns to the right at a self-selected normal speed. Older 
      adults turned with lower RCOF than the young adults during both step and spin 
      turns. This was associated with reduced mediolateral (ML) RCOF component 
      (RCOF(ML)) for the older adults. Reduced RCOF(ML) in older adults was associated 
      with reductions in the ML component of the lean angle of the body during turning. 
      This age-related gait changes during turning can be compensatory mechanisms that 
      allowed older adults to turn while reducing the risk of slipping. Spin turns 
      exhibited lower RCOF, resulting from significantly lower RCOF(ML), than step 
      turns in young and older adults; thus, spin turning is a safer turning strategy 
      for preventing lateral slips. This may suggest that, in older adults, slip 
      prevention may take precedence over balance recovery after slips sustained during 
      turning. These results illustrate a turning gait mechanism that helps prevent 
      slips and falls, and how age affects this mechanism.
CI  - Copyright (c) 2018 Elsevier Ltd. All rights reserved.
FAU - Yamaguchi, Takeshi
AU  - Yamaguchi T
AD  - Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, 
      Aoba-ku, Sendai, Miyagi 980-8579, Japan; Graduate School of Biomedical 
      Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 
      980-8579, Japan. Electronic address: yamatake@gdl.mech.tohoku.ac.jp.
FAU - Okamoto, Ryosuke
AU  - Okamoto R
AD  - Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, 
      Aoba-ku, Sendai, Miyagi 980-8579, Japan.
FAU - Hokkirigawa, Kazuo
AU  - Hokkirigawa K
AD  - Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki-Aza-Aoba, 
      Aoba-ku, Sendai, Miyagi 980-8579, Japan.
FAU - Masani, Kei
AU  - Masani K
AD  - Institute of Biomaterials and Biomedical Engineering, University of Toronto, 
      Toronto, Ontario, Canada; Lyndhurst Centre, Toronto Rehabilitation 
      Institute-University Health Network, Toronto, Ontario, Canada.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20180503
PL  - United States
TA  - J Biomech
JT  - Journal of biomechanics
JID - 0157375
SB  - IM
MH  - Accidental Falls
MH  - Adult
MH  - Aged
MH  - Biomechanical Phenomena
MH  - Female
MH  - Friction
MH  - Gait/*physiology
MH  - Humans
MH  - Male
MH  - Postural Balance
MH  - Young Adult
OTO - NOTNLM
OT  - Aging
OT  - Mediolateral direction
OT  - Required coefficient of friction
OT  - Slips and falls
OT  - Turn
EDAT- 2018/05/13 06:00
MHDA- 2019/04/09 06:00
CRDT- 2018/05/13 06:00
PHST- 2017/12/04 00:00 [received]
PHST- 2018/04/19 00:00 [revised]
PHST- 2018/04/22 00:00 [accepted]
PHST- 2018/05/13 06:00 [pubmed]
PHST- 2019/04/09 06:00 [medline]
PHST- 2018/05/13 06:00 [entrez]
AID - S0021-9290(18)30339-7 [pii]
AID - 10.1016/j.jbiomech.2018.04.038 [doi]
PST - ppublish
SO  - J Biomech. 2018 Jun 6;74:163-170. doi: 10.1016/j.jbiomech.2018.04.038. Epub 2018 
      May 3.