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Gabrielle G. Gilmer, Jessica K. Washington, Jeffrey R. Dugas, James R. Andrews and Gretchen D. Oliver

The key component of the kinetic chain that influences both the proximal and distal ends is the LPHC. The LPHC contains the muscle groups that connect the abdomen, proximal lower-extremity, hips, pelvis, trunk, and spine. 7 Ultimately, the LPHC’s role in throwing is to maintain stability for

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Paul J. Felton, Maurice R. Yeadon and Mark A. King

plane rotations of the pelvis and torso which cause the projections of the hip and pelvis joint centers to become noncoincident in the sagittal plane. In previous planar models, the use of coincident hip and shoulder joint centers has been found to be acceptable for models of takeoff where the key

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Lindsey Tulipani, Mark G. Boocock, Karen V. Lomond, Mahmoud El-Gohary, Duncan A. Reid and Sharon M. Henry

assess movement quality of multiple segments (pelvis, knee, and foot) simultaneously. 1 These studies demonstrate that PTs are less likely to assess movement patterns correctly during dynamic tasks and/or when tracking the alignment and movement quality of multiple body segments. Consequently, PTs may

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Melanie B. Lott and Gan Xu

the supporting limb’s ankle, knee, and hip joints and the pelvis-trunk joint during pirouettes. It has been shown that dancers who complete >2 revolutions in a pirouette do so by making adjustments during the turn, 10 , 11 but it is unknown whether these adjustments are continuous or more discrete

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Mary Emily Littrell, Young-Hui Chang and Brian P. Selgrade

, deg  25% 0.374 (0.26) NS 0.469 (0.11) NS 1.20 ( 0.22 ) NS  50% 0.477 (0.18) NS 0.450 (0.10) NS NS NS  75% NS 0.797 (0.10) 0.631 (0.10) NS 2.18 ( 0.33 ) NS Pelvis angle, deg  25% 9.01 ( 0.13 ) 10.10 ( 0.15 ) 10.79 ( 0.09 ) 9.04 ( 0.17 ) 4.82 ( 0.68 ) 8.75 ( 0.17 )  50% 5.22 ( 0.12 ) 5.71 ( 0

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Rafael F. Escamilla, Jonathan S. Slowik, Alek Z. Diffendaffer and Glenn S. Fleisig

was hypothesized that pelvis and upper trunk axial rotation and elbow extension velocities will be greatest in the sidearm group, whereas shoulder external rotation, shoulder internal rotation angular velocity, and trunk forward tilt would be greatest in the overhand group. Methods This study was

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Ziemowit Bańkosz and Sławomir Winiarski

–extension and internal–external rotation); knee joint (flexion–extension and internal–external rotation); and hip joint (flexion–extension, internal–external rotation, and abduction–adduction). In addition, spatial orientation of pelvis (obliquity, tilt, and rotation); shoulder girdle (obliquity, tilt, and

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Yoann Blache, Maarten Bobbert, Sebastien Argaud, Benoit Pairot de Fontenay and Karine M. Monteil

In experiments investigating vertical squat jumping, the HAT segment is typically defined as a line drawn from the hip to some point proximally on the upper body (eg, the neck, the acromion), and the hip joint as the angle between this line and the upper legs (θUL-HAT). In reality, the hip joint is the angle between the pelvis and the upper legs (θUL-pelvis). This study aimed to estimate to what extent hip joint definition affects hip joint work in maximal squat jumping. Moreover, the initial pelvic tilt was manipulated to maximize the difference in hip joint work as a function of hip joint definition. Twenty-two male athletes performed maximum effort squat jumps in three different initial pelvic tilt conditions: backward (pelvisB), neutral (pelvisN), and forward (pelvisF). Hip joint work was calculated by integrating the hip net joint torque with respect to θUL-HAT (WUL-HAT) or with respect to θUL-pelvis (WUL-pelvis). θUL-HAT was greater than θUL-pelvis in all conditions. WUL-HAT overestimated WUL-pelvis by 33%, 39%, and 49% in conditions pelvisF, pelvisN, and pelvisB, respectively. It was concluded that θUL-pelvis should be measured when the mechanical output of hip extensor muscles is estimated.

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Ben Serrien, Maggy Goossens and Jean-Pierre Baeyens

processing. The marker coordinates were used to construct local orthonormal reference frames per segment to calculate segment angles (pelvis and trunk) and joint angles (shoulder, elbow, and wrist) based on the International Society of Biomechanics (ISB) guidelines for construction of reference frames and

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Eric Foch and Clare E. Milner

Proximal factors such as excessive frontal plane pelvis and trunk motion have been postulated to be biomechanical risk factors associated with iliotibial band syndrome. In addition, lateral core endurance deficiencies may be related to increased pelvis and trunk motion during running. The purpose of this cross-sectional investigation was to determine if differences in biomechanics during running, as well as lateral core endurance exist between female runners with previous iliotibial band syndrome and controls. Gait and lateral core endurance were assessed in 34 female runners (17 with previous iliotibial band syndrome). Multivariate analysis of variance was performed to assess between group difference in pelvis, trunk, hip, and knee variables of interest. Runners with previous iliotibial band syndrome exhibited similar peak trunk lateral flexion, peak contralateral pelvic drop, peak hip adduction, and peak external knee adduction moment compared with controls. In addition, trunk-pelvis coordination was similar between groups. Contrary to our hypotheses, both groups exhibited trunk ipsilateral flexion. Lateral core endurance was not different between groups. These findings provide the first frontal plane pelvis and trunk kinematic data set in female runners with previous iliotibial band syndrome. Frontal plane pelvis and trunk motion may not be associated with iliotibial band syndrome.