Research output: Contribution to journal › Journal articles › Research
A body-fixed-sensor-based analysis of power during sit-to-stand movements. / Zijlstra, Wiebren; Bisseling, Robertus Wilhelmus; Schlumbohm, Stephan; Baldus, Heribert.
In: Gait & posture, Vol. 31, No. 2, 2010, p. 272-278.Research output: Contribution to journal › Journal articles › Research
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TY - JOUR
T1 - A body-fixed-sensor-based analysis of power during sit-to-stand movements
AU - Zijlstra, Wiebren
AU - Bisseling, Robertus Wilhelmus
AU - Schlumbohm, Stephan
AU - Baldus, Heribert
PY - 2010
Y1 - 2010
N2 - This study presents an analysis of power exertion for lifting the body's centre of mass (CoM) during rising from a chair. Five healthy young (21-44 years) and 12 healthy older (70-79 years) subjects performed sit-to-stand (STS) movements while data were measured with force-plates underneath chair and feet and motion sensors attached to different locations on the upper and lower trunk. Force-plate-data were used to determine the timing of STS movements and the vertical power for lifting the CoM from a sitting to a standing position. Data of three-dimensional hybrid motion sensors, consisting of accelerometers, gyroscopes and earth-magnetic-field sensors, were used to determine vertical accelerations and power. The comparison of sensor-based estimations of peak power with peak power calculated from force-plate-data demonstrated fair to excellent linear relationships for all sensor locations on the trunk. The best approximation of peak power was obtained by a weighted combination of data measured at different trunk locations. Results of the older subjects were consistent with those of the young subjects performing slow, normal and fast STS movements. The presented approach is relevant for monitoring fall risk and assessment of mobility in older people. Similar approaches for assessing power may be developed for other mobility related activities, such as stair walking, or sports related activities such as jumping.
AB - This study presents an analysis of power exertion for lifting the body's centre of mass (CoM) during rising from a chair. Five healthy young (21-44 years) and 12 healthy older (70-79 years) subjects performed sit-to-stand (STS) movements while data were measured with force-plates underneath chair and feet and motion sensors attached to different locations on the upper and lower trunk. Force-plate-data were used to determine the timing of STS movements and the vertical power for lifting the CoM from a sitting to a standing position. Data of three-dimensional hybrid motion sensors, consisting of accelerometers, gyroscopes and earth-magnetic-field sensors, were used to determine vertical accelerations and power. The comparison of sensor-based estimations of peak power with peak power calculated from force-plate-data demonstrated fair to excellent linear relationships for all sensor locations on the trunk. The best approximation of peak power was obtained by a weighted combination of data measured at different trunk locations. Results of the older subjects were consistent with those of the young subjects performing slow, normal and fast STS movements. The presented approach is relevant for monitoring fall risk and assessment of mobility in older people. Similar approaches for assessing power may be developed for other mobility related activities, such as stair walking, or sports related activities such as jumping.
KW - Acceleration
KW - Accidental Falls/prevention control
KW - Adult
KW - Aged
KW - Biomechanical Phenomena
KW - Disability Evaluation
KW - Female
KW - Humans
KW - Imaging, Three-Dimensional/instrumentation
KW - Male
KW - Movement/physiology
KW - Posture/physiology
KW - Pressure
KW - Risk Assessment
U2 - 10.1016/j.gaitpost.2009.11.003
DO - 10.1016/j.gaitpost.2009.11.003
M3 - Journal articles
VL - 31
SP - 272
EP - 278
JO - Gait & posture
JF - Gait & posture
SN - 0966-6362
IS - 2
ER -
ID: 29914