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Claudine J C Lamoth - One of the best experts on this subject based on the ideXlab platform.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M Uij, Onno G Meije, Jaap H Van Diee, Idsa Kingma, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms. © 2007 Elsevier B.V. All rights reserved.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M. Bruijn, Idsa Kingma, Onno G. Meijer, Jaap H. Van Dieën, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms.
Onno G. Meijer - One of the best experts on this subject based on the ideXlab platform.
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Axial Pelvis range of motion affects thorax-Pelvis timing during gait
Journal of Biomechanics, 2019Co-Authors: Maarten R. Prins, Luca E. Cornelisse, Onno G. Meijer, Peter Van Der Wurff, Sjoerd M. Bruijn, Jaap H. Van DieënAbstract:During gait, patients with pelvic girdle pain and low back pain demonstrate an altered phase relationship between axial thorax and Pelvis rotations (thorax-Pelvis relative phase). This could be the result of an increase in axial Pelvis range of motion (ROM) which has been observed in these patients as well. To establish this relationship, we investigated if altered axial Pelvis ROM during gait affects thorax-Pelvis relative phase in 12 healthy subjects. These subjects walked on a treadmill and received real-time feedback on axial Pelvis rotations. Subjects were asked to (1) walk normal, and walk with (2) decreased and (3) increased Pelvis ROM. Gait speed and stride frequency were matched between trials. Subjects were able to increase Pelvis ROM to a large extent, but the reduction in Pelvis ROM was relatively small. Walking with large Pelvis ROM resulted in a change in thorax-Pelvis relative phase similar to that in pelvic girdle pain and low back pain. A forward dynamic model was used to predict the effect of manipulation of Pelvis ROM on timing of thorax rotations independent of apparent axial trunk stiffness and arm swing amplitude (which can both affect thorax-Pelvis relative phase). The model predicted a similar, even larger, effect of large axial Pelvis ROM on thorax-Pelvis relative phase, as observed experimentally. We conclude that walking with actively increased ROM of axial Pelvis rotations in healthy subjects is associated with a shift in thorax-Pelvis relative phase, similar to observations in patients with pelvic girdle pain and low back pain.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M. Bruijn, Idsa Kingma, Onno G. Meijer, Jaap H. Van Dieën, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms.
Idsa Kingma - One of the best experts on this subject based on the ideXlab platform.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M Uij, Onno G Meije, Jaap H Van Diee, Idsa Kingma, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms. © 2007 Elsevier B.V. All rights reserved.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M. Bruijn, Idsa Kingma, Onno G. Meijer, Jaap H. Van Dieën, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms.
Onno G Meije - One of the best experts on this subject based on the ideXlab platform.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M Uij, Onno G Meije, Jaap H Van Diee, Idsa Kingma, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms. © 2007 Elsevier B.V. All rights reserved.
Sjoerd M Uij - One of the best experts on this subject based on the ideXlab platform.
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coordination of leg swing thorax rotations and Pelvis rotations during gait the organisation of total body angular momentum
Gait & Posture, 2008Co-Authors: Sjoerd M Uij, Onno G Meije, Jaap H Van Diee, Idsa Kingma, Claudine J C LamothAbstract:In walking faster than 3 km/h, transverse pelvic rotation lengthens the step ("pelvic step"). It is often assumed that the thorax then starts to counter rotate to limit total body angular momentum around the vertical. But the relative timing of Pelvis and thorax rotation during gait is insufficiently understood. The present study aimed at analysing how transverse Pelvis and thorax rotations relate to the movements of the upper leg, and how these patterns contribute to total body angular momentum. Nine healthy male volunteers walked on a treadmill at nine different velocities, ranging from 2.0 km/h to 5.2 km/h. Full body kinematics were recorded. Femur-Pelvis, Pelvis-thorax, and femur-thorax relative phase were calculated, as well as transverse plane angular momentum of all body segments. The shift in Pelvis-thorax coordination from in-phase to out of phase with increasing velocity was found to depend on the Pelvis beginning to move in-phase with the femur, while the thorax continued to counter rotate with respect to the femur. Moreover, pelvic and thoracic contributions to total body angular momentum were low (less than 10%), while contributions of the legs and arms were much larger (approximately 90%), suggesting that Pelvis-thorax coordination is relatively unimportant to the organisation of total body angular momentum. Taken together, these results may imply that our understanding of the pelvic step need to be changed. Moreover, the alterations in Pelvis-thorax relative phase that were reported for different locomotor pathologies may depend on different mechanisms. © 2007 Elsevier B.V. All rights reserved.
