PMID- 23218767
OWN - NLM
STAT- MEDLINE
DCOM- 20140310
LR  - 20130708
IS  - 1879-2219 (Electronic)
IS  - 0966-6362 (Linking)
VI  - 38
IP  - 2
DP  - 2013 Jun
TI  - Kinematics of center of mass and center of pressure predict friction requirement 
      at shoe-floor interface during walking.
PG  - 209-14
LID - S0966-6362(12)00408-0 [pii]
LID - 10.1016/j.gaitpost.2012.11.007 [doi]
AB  - We aimed to determine whether inclination angles of the line connecting the whole 
      body center of mass (COM) to the center of pressure (COP) (COM-COP angle) help 
      predict the required coefficient of friction (RCOF) in young adult males during 
      the weight acceptance and push-off phases in transient movements such as turning, 
      gait termination and initiation, and steady-state movements such as straight 
      walking. Seventeen healthy young adult males were asked to (1) walk in a straight 
      line, (2) turn 60 degrees  with either foot (step and spin turns), and (3) initiate and 
      terminate walking on a dry level floor. Peak absolute values of the ratio between 
      resultant horizontal and vertical ground reaction forces during the weight 
      acceptance and push-off phases (RCOFh and RCOFt, respectively) were calculated. 
      COM-COP angles thetah and thetat at the instant of RCOFh and RCOFt, respectively, were 
      also calculated. Bivariate regression analysis demonstrated that the |thetah| and 
      |thetat| tangents were significant predictors of RCOFh (R = 0.878; R(2) = 0.770; 
      p<0.001) and RCOFt (R = 0.918; R(2) = 0.843; p<0.001), respectively. The results 
      suggest that COM and COP kinematics (i.e., the COM-COP angle) serve as a 
      predictor of friction requirement during the weight acceptance and push-off 
      phases in steady-state movements such as straight walking and transient movements 
      such as turning as well as gait termination and initiation.
CI  - Copyright (c) 2012 Elsevier B.V. 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. yamatake@gdl.mech.tohoku.ac.jp
FAU - Yano, Masaru
AU  - Yano M
FAU - Onodera, Hiroshi
AU  - Onodera H
FAU - Hokkirigawa, Kazuo
AU  - Hokkirigawa K
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20121205
PL  - England
TA  - Gait Posture
JT  - Gait & posture
JID - 9416830
SB  - IM
MH  - Accidental Falls/prevention & control
MH  - Biomechanical Phenomena
MH  - *Floors and Floorcoverings
MH  - Friction/*physiology
MH  - Gait/*physiology
MH  - Humans
MH  - Male
MH  - Postural Balance/*physiology
MH  - *Pressure
MH  - Regression Analysis
MH  - *Shoes
MH  - Young Adult
OTO - NOTNLM
OT  - Center of mass
OT  - Center of pressure
OT  - Required coefficient of friction
OT  - Slips and falls
OT  - Turn
EDAT- 2012/12/12 06:00
MHDA- 2014/03/13 06:00
CRDT- 2012/12/11 06:00
PHST- 2012/01/13 00:00 [received]
PHST- 2012/10/26 00:00 [revised]
PHST- 2012/11/10 00:00 [accepted]
PHST- 2012/12/11 06:00 [entrez]
PHST- 2012/12/12 06:00 [pubmed]
PHST- 2014/03/13 06:00 [medline]
AID - S0966-6362(12)00408-0 [pii]
AID - 10.1016/j.gaitpost.2012.11.007 [doi]
PST - ppublish
SO  - Gait Posture. 2013 Jun;38(2):209-14. doi: 10.1016/j.gaitpost.2012.11.007. Epub 
      2012 Dec 5.