Category: Research Corner

Comparison of Hip and Knee Strength and Neuromuscular Activity in Participants With and Without Patellofemoral Pain Syndrome

Research Review: Comparison of Hip and Knee Strength and Neuromuscular Activity in Subjects With and Without Patellofemoral Pain Syndrome

By Tristan Rodik, M.AT, ATC

Edited By Brent Brookbush, DPT, PT, COMT, MS, PES, CES, CSCS, ACSM H/FS

Original Citation: Bolgla, L. A., Malone, T. R., Umberger, B. R., and Uhl, T. L. (2011)  Comparison of hip and knee strength and neuromuscular activity in subjects with and without patellofemoral pain syndrome. The International Journal of Sports Physical Therapy, 6(4), 285-296. FULL TEXT

Why the Study is Relevant: Patellofemoral pain syndrome (PFPS) is common in active populations and has been correlated with altered lower-extremity kinematics, patellar tracking issues and decreased hip strength (1-11). This 2011 study by Bolgla et al. investigated hip strength, knee strength and muscular activity during stair climbing in participants with and without PFPS. Lower values of hip abduction and external rotation strength were observed in those with PFPS; where as vastus medialis and vastus lateralis recruitment did not significantly differ between groups. T

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Influences of Trunk Muscles on Lumbar Lordosis and Sacral Angle

Research Review: Influences of Trunk Muscles on Lumbar Lordosis and Sacral Angle

 

By Corbin Henault MEd, ATC

Edited by Brent Brookbush, DPT, PT, COMT, MS, PES, CES, CSCS, ACSM H/FS

Original Citation: Kim, H. J., Chung, S., Kim, S., Shin, H., Lee, J., Kim, S., & Song, M. Y. (2006). Influences of trunk muscles on lumbar lordosis and sacral angle. European Spine Journal, 15(4), 409. ABSTRACT

Why the Study is Relevant: Low back pain (LBP) is the most common cause of reduced activity in individuals under 45 (1). Trunk muscle strength ratios and lumbar angle appear to play a key role in the development and persistence of chronic LBP (4 - 11). This 2006 study by Korean and U.S. researchers examined whether a relationship exists between trunk muscle strength and lumbosacral spine angles in individuals with chronic LBP.  The findings demonstrate that trunk flexor to extensor muscle strength is correlated with lordotic angle. Human movement professionals may be able to improve evaluation, treatment and rehabilitation by assessing and addressing this issues.

Study Summary

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EMG Analysis of Hip Rehabilitation Exercises in a Group of Healthy Subjects

Research Review: Electromyographic Analysis of Hip Rehabilitation Exercises in a Group of Healthy Subjects

By Tristan Rodik, M.AT., ATC

Edited By Brent Brookbrush, DPT, PT, COMT, MS, PES, CES, CSCS, ACSM H/FS

 

Original Citation: Bolgla, L. A. and Uhl, T. L. (2005) Electromyographic analysis of hip rehabilitation exercises in a group of healthy subjects. Journal of Orthopaedic and Sports Physical Therapy, 35(8), 487-494. ABSTRACT

Why the Study is Relevant: Hip abductor weakness is correlated with low-back pain, patellofemoral pain syndrome, achilles tendinopathy, and optimal function of the lower extremity and lumbo pelvic hip complex (1-10). Human movement professionals in rehab and performance settings use a wide variety of exercises to address hip abductor weakness. This 2005 study by Bolgla et al. adds to a growing body of research using electromyography to compare gluteus medius strengthening exercises (11-14). Findings suggest that weight-bearing exercises result in greater percentage of  maximum voluntary isometric contraction (%MVIC) than non weight-bearing exercise. "Pelvic drops" produced th

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The Role of Tibialis Posterior Fatigue on Foot Kinematics During Walking

Research Review: The Role of Tibialis Posterior Fatigue on Foot Kinematics During Walking

By David Chessen DPT, PT, OCS, MBA

Edited by Brent Brookbush DPT, PT, COMT, MS, PES, CES, CSCS, ACSM H/FS

Original Citation: Pohl, M. B., Rabbito, M., and Ferber, R. (2010). The role of tibialis posterior fatigue on foot kinematics during walking. Journal of Foot and Ankle Research, 3(1), 6. ABSTRACT

Why the Study Is Relevant: The tibialis posterior serves as an invertor of the rear foot and provides dynamic arch support for the mid foot (1). The effect of tibialis posterior dysfunction on the mechanics of ambulation has been well documented (2,3). However, the effect of tibialis posterior fatigue on foot kinematics in healthy individuals has received little attention. This 2010 study investigated the effect of fatiguing the tibialis posterior through resisted foot adduction on foot kinematics during walking.

 

Study Summary

Study Design
 Single-group quasi experimental

Level of Evidence
IIB evidence from at least one other type of quasi-experiment

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Hip Strength and Hip and Knee Kinematics During Stair Descent in Females With and Without Patellofemoral Pain Syndrome

Research Review: Hip Strength and Hip and Knee Kinematics During Stair Descent in Females With and Without Patellofemoral Pain Syndrome

By Tristan Rodik, M.AT., ATC

Edited by Brent Brookbush DPT, PT, COMT, MS, PES, CES, CSCS, ACSM H/FS

Original Citation: Bolgla, L. A., Malone, T. R., Umberger, B. R., and Uhl, T. L. (2008) Hip strength and hip and knee kinematics during stair descent in females with and without patellofemoral pain syndrome. Journal of Orthopaedic & Sports Physical Therapy, 38(1), 12-18 ABSTRACT

Why the Study is Relevant: Patellofemoral pain syndrome (PFPS) is a common complaint among healthy, active females. Current research highlights the importance of hip strength in PFPS patients (1-8). This 2008 study compared hip strength and hip and knee kinematics in women with and without PFPS. The findings suggest that PFPS result in weaker hip external rotators and hip abductors with no significant difference in hip or knee kinematics. This suggests that human movement professionals should assess and address hip strength when treating females with PFPS, even when changes to kinematics

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