Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking. / Raffalt, P. C.; Vallabhajosula, S.; Renz, J. J.; Mukherjee, M.; Stergiou, N.

In: Royal Society Open Science, Vol. 5, No. 12, 180996 , 2018.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Raffalt, PC, Vallabhajosula, S, Renz, JJ, Mukherjee, M & Stergiou, N 2018, 'Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking', Royal Society Open Science, vol. 5, no. 12, 180996 . https://doi.org/10.1098/rsos.180996

APA

Raffalt, P. C., Vallabhajosula, S., Renz, J. J., Mukherjee, M., & Stergiou, N. (2018). Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking. Royal Society Open Science, 5(12), [180996 ]. https://doi.org/10.1098/rsos.180996

Vancouver

Raffalt PC, Vallabhajosula S, Renz JJ, Mukherjee M, Stergiou N. Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking. Royal Society Open Science. 2018;5(12). 180996 . https://doi.org/10.1098/rsos.180996

Author

Raffalt, P. C. ; Vallabhajosula, S. ; Renz, J. J. ; Mukherjee, M. ; Stergiou, N. / Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking. In: Royal Society Open Science. 2018 ; Vol. 5, No. 12.

Bibtex

@article{20bb471dfefc491286618905d386bbf6,
title = "Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking",
abstract = "The present study tested if the quadratic relationship which exists between stepping frequency and gait dynamics in walking can be generalized to stairmill climbing. To accomplish this, we investigated the joint angle dynamics and variability during continuous stairmill climbing at stepping frequencies both above and below the preferred stepping frequency (PSF). Nine subjects performed stairmill climbing at 80, 90, 100, 110 and 120% PSF and treadmill walking at preferred walking speed during which sagittal hip, knee and ankle angles were extracted. Joint angle dynamics were quantified by the largest Lyapunov exponent (LyE) and correlation dimension (CoD). Joint angle variability was estimated by the mean ensemble standard deviation (meanSD). MeanSD and CoD for all joints were significantly higher during stairmill climbing but there were no task differences in LyE. Changes in stepping frequency had only limited effect on joint angle variability and did not affect joint angle dynamics. Thus, we concluded that the quadratic relationship between stepping frequency and gait dynamics observed in walking is not present in stairmill climbing based on the investigated parameters.",
keywords = "biomechanics, gait, variability, nonlinear dynamics, kinematics, stairs",
author = "Raffalt, {P. C.} and S. Vallabhajosula and Renz, {J. J.} and M. Mukherjee and N. Stergiou",
year = "2018",
doi = "10.1098/rsos.180996",
language = "English",
volume = "5",
journal = "Royal Society Open Science",
issn = "2054-5703",
publisher = "TheRoyal Society Publishing",
number = "12",

}

RIS

TY - JOUR

T1 - Lower limb joint angle variability and dimensionality are different in stairmill climbing and treadmill walking

AU - Raffalt, P. C.

AU - Vallabhajosula, S.

AU - Renz, J. J.

AU - Mukherjee, M.

AU - Stergiou, N.

PY - 2018

Y1 - 2018

N2 - The present study tested if the quadratic relationship which exists between stepping frequency and gait dynamics in walking can be generalized to stairmill climbing. To accomplish this, we investigated the joint angle dynamics and variability during continuous stairmill climbing at stepping frequencies both above and below the preferred stepping frequency (PSF). Nine subjects performed stairmill climbing at 80, 90, 100, 110 and 120% PSF and treadmill walking at preferred walking speed during which sagittal hip, knee and ankle angles were extracted. Joint angle dynamics were quantified by the largest Lyapunov exponent (LyE) and correlation dimension (CoD). Joint angle variability was estimated by the mean ensemble standard deviation (meanSD). MeanSD and CoD for all joints were significantly higher during stairmill climbing but there were no task differences in LyE. Changes in stepping frequency had only limited effect on joint angle variability and did not affect joint angle dynamics. Thus, we concluded that the quadratic relationship between stepping frequency and gait dynamics observed in walking is not present in stairmill climbing based on the investigated parameters.

AB - The present study tested if the quadratic relationship which exists between stepping frequency and gait dynamics in walking can be generalized to stairmill climbing. To accomplish this, we investigated the joint angle dynamics and variability during continuous stairmill climbing at stepping frequencies both above and below the preferred stepping frequency (PSF). Nine subjects performed stairmill climbing at 80, 90, 100, 110 and 120% PSF and treadmill walking at preferred walking speed during which sagittal hip, knee and ankle angles were extracted. Joint angle dynamics were quantified by the largest Lyapunov exponent (LyE) and correlation dimension (CoD). Joint angle variability was estimated by the mean ensemble standard deviation (meanSD). MeanSD and CoD for all joints were significantly higher during stairmill climbing but there were no task differences in LyE. Changes in stepping frequency had only limited effect on joint angle variability and did not affect joint angle dynamics. Thus, we concluded that the quadratic relationship between stepping frequency and gait dynamics observed in walking is not present in stairmill climbing based on the investigated parameters.

KW - biomechanics

KW - gait

KW - variability

KW - nonlinear dynamics

KW - kinematics

KW - stairs

U2 - 10.1098/rsos.180996

DO - 10.1098/rsos.180996

M3 - Journal article

VL - 5

JO - Royal Society Open Science

JF - Royal Society Open Science

SN - 2054-5703

IS - 12

M1 - 180996

ER -

ID: 212947999