PMID- 25468662
OWN - NLM
STAT- MEDLINE
DCOM- 20150917
LR  - 20181202
IS  - 1873-2380 (Electronic)
IS  - 0021-9290 (Print)
IS  - 0021-9290 (Linking)
VI  - 48
IP  - 1
DP  - 2015 Jan 2
TI  - Corner height influences center of mass kinematics and path trajectory during 
      turning.
PG  - 104-12
LID - S0021-9290(14)00565-X [pii]
LID - 10.1016/j.jbiomech.2014.10.034 [doi]
AB  - Despite the prevalence of directional changes during every-day gait, relatively 
      little is known about turning compared to straight gait. While the center of mass 
      (COM) movement during straight gait is well characterized, the COM trajectory and 
      the factors that influence it are less established for turning. This study 
      investigated the influence of a corner׳s height on the COM trajectory as 
      participants walked around the corner. Ten participants (25.3+/-3.74 years) 
      performed both 90 degrees  step and spin turns to the left at self-selected slow, normal, 
      and fast speeds while walking inside a marked path. A pylon was placed on the 
      inside corner of the path. Four different pylon heights were used to correspond 
      to heights of everyday objects: 0 cm (no object), 63 cm (box, crate), 104 cm 
      (desk, table, counter), 167 cm (shelf, cabinet). Obstacle height was found to 
      significantly affect the COM trajectory. Taller obstacles resulted in more 
      distance between the corner and the COM, and between the corner and the COP. 
      Taller obstacles also were associated with greater curvature in the COM 
      trajectory, indicating a smaller turning radius despite the constant 90 degrees  corner. 
      Taller obstacles correlated to an increased required coefficient of friction 
      (RCOF) due to the smaller turning radii. Taller obstacles also tended towards 
      greater mediolateral (ML) COM-COP angles, contrary to the initial hypothesis. 
      Additionally, the COM was found to remain outside the base of support (BOS) for 
      the entire first half of stance phase for all conditions indicating a high risk 
      of falls resulting from slips.
CI  - Published by Elsevier Ltd.
FAU - Fino, Peter C
AU  - Fino PC
AD  - Department of Mechanical Engineering, Virginia Polytechnic Institute and State 
      University, Blacksburg, Virginia.
FAU - Lockhart, Thurmon E
AU  - Lockhart TE
AD  - School of Biological and Health Systems Engineering, Ira A. Fulton Schools of 
      Engineering, Arizona State University, Tempe, Arizona. Electronic address: 
      thurmon.lockhart@asu.edu.
FAU - Fino, Nora F
AU  - Fino NF
AD  - Department of Biostatistical Sciences, Division of Public Health Sciences, Wake 
      Forest School of Medicine, Winston-Salem, North Carolina.
LA  - eng
GR  - L30 AG022963/AG/NIA NIH HHS/United States
GR  - R01 OH009222/OH/NIOSH CDC HHS/United States
GR  - R01-OH009222/OH/NIOSH CDC HHS/United States
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
PT  - Research Support, U.S. Gov't, P.H.S.
DEP - 20141111
PL  - United States
TA  - J Biomech
JT  - Journal of biomechanics
JID - 0157375
SB  - IM
MH  - Adolescent
MH  - Adult
MH  - Biomechanical Phenomena
MH  - Female
MH  - Friction
MH  - *Gait
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Movement
MH  - Walking/*physiology
MH  - Young Adult
PMC - PMC4274227
MID - NIHMS643597
OTO - NOTNLM
OT  - Biomechanics
OT  - COM
OT  - Center of mass
OT  - Gait
OT  - RCOF
OT  - Speed
OT  - Turning
OT  - Turning angle
COIS- Conflict of Interest The authors affirm there are no conflicts of interest.
EDAT- 2014/12/04 06:00
MHDA- 2015/09/18 06:00
PMCR- 2016/01/02
CRDT- 2014/12/04 06:00
PHST- 2014/03/24 00:00 [received]
PHST- 2014/10/28 00:00 [revised]
PHST- 2014/10/31 00:00 [accepted]
PHST- 2014/12/04 06:00 [entrez]
PHST- 2014/12/04 06:00 [pubmed]
PHST- 2015/09/18 06:00 [medline]
PHST- 2016/01/02 00:00 [pmc-release]
AID - S0021-9290(14)00565-X [pii]
AID - 10.1016/j.jbiomech.2014.10.034 [doi]
PST - ppublish
SO  - J Biomech. 2015 Jan 2;48(1):104-12. doi: 10.1016/j.jbiomech.2014.10.034. Epub 
      2014 Nov 11.