The influence of abnormal hip mechanics on knee injury: a biomechanical perspective.
During the last decade, there has been a growing body of literature suggesting that proximal factors may play a contributory role with respect to knee injuries. A review of the biomechanical and clinical studies in this area indicated that impaired muscular control of the hip, pelvis, and trunk can affect tibiofemoral and patellofemoral joint kinematics and kinetics in multiple planes. In particular, there is evidence that motion impairments at the… Continue readingCompetitive Female Runners With a History of Iliotibial Band Syndrome Demonstrate Atypical Hip and Knee Kinematics
ITBS is the second leading cause of knee pain in runners and the most common cause of lateral knee pain. Despite its prevalence, few biomechanical studies have been conducted to better understand its aetiology. Because the iliotibial band has both femoral and tibial attachments, it is possible that atypical hip and foot mechanics could result in the development of ITBS. The objective of this study was to examine differences in… Continue readingFoot orthoses and physiotherapy in the treatment of patellofemoral pain syndrome: randomised clinical trial.
Collins N, Crossley K, Beller E, Darnell R, McPoil T, Vicenzino B
The objective of this study ws to compare the clinical efficacy of foot orthoses in the management of patellofemoral pain syndrome with flat inserts or physiotherapy, and to investigate the effectiveness of foot orthoses plus physiotherapy. 179 participants with a clinical diagnosis of patellofemoral pain syndrome of greater than six weeks' duration, who had no previous treatment with foot… Continue reading
Patellofemoral compressive force and stress during the forward and side lunges with and without a stride.
Escamilla RF, Zheng N, Macleod TD, Edwards WB, Hreljac A, Fleisig GS, Wilk KE, Moorman CT, Imamura R
The aim of this study was to measure patellofemoral compressive force and stress during weight bearing lunge exercises that are frequently employed during patellofemoral rehabilitation. Patellofemoral force and stress progressively decreased as knee flexion increased and progressively increased as knee flexion decreased. Patellofemoral force and stress were greater in the side lunge… Continue reading
Lower Extremity Jumping Mechanics of Female Athletes With and Without Patellofemoral Pain Before and After Exertion.
Willson JD, Binder-Macleod S, Davis IS
The purpose of this study was to evaluate the differences in lower extremity mechanics during single-legged jumps between female athletes with and without patellofemoral pain after exertion. Twenty women with patellofemoral pain and 20 healthy female controls participated in a functional lower extremity exertion protocol of repetitive single-legged jumps. Pain, exertion, hip and trunk strength, and 3-dimensional lower extremity joint mechanics were recorded at… Continue reading
Influence of elbow flexion angle on mobilization of the proximal radio-ulnar joint: A motion analysis using cadaver specimens
Sadanori Ohshiro, Egi Hidaka, Shigenori Miyamoto, Mitsuhiro Aoki, Toshihiko Yamashita and Haruyuki Tatsumi
The purpose of this study was to determine the most effective elbow joint flexion angle for mobilization of the proximal radio-ulnar joint. Five fresh-frozen cadaveric elbows were used to measure displacement of the radial head in the antero-medial and postero-lateral directions by traction force of 2 kgf and 4 kgf, respectively. Simulation of the gliding of… Continue reading
Relative contributions of the infraspinatus and deltoid during external rotation in patients with symptomatic subacromial impingement
Elizabeth F.Clisby, Natalie L. Bitter, Michael J. Sandow, Mark A. Jones, Mary E. Magarey and Shapour Jaberzadeh
A principal cause of subacromial impingement (SAI) is failure of the rotator cuff to center the humeral head in the glenoid during shoulder motion, counteracting the effect of the deltoid. As rehabilitation of the rotator cuff endeavors to restore balance between these muscle groups, the purpose of this study was to evaluate… Continue reading
Scapulohumeral rhythm and associated spinal motion
Jack Crosbie, Sharon L. Kilbreath, Luise Hollmann and Sarah York
The purpose of this study was to investigate the coordination of humeral, scapular and thoracolumbar spine motions during a number of unilateral and bilateral upper limb movements in a range of movement conditions. The study found that humeral, scapular and thoracic segments demonstrate consistent, synchronous interactions. Scapular upward rotation is significantly greater on the non-dominant side than the… Continue reading
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