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The effects of quadriceps strengthening on pain, function, and patellofemoral joint contact area in persons with patellofemoral pain.
Am J Phys Med Rehabil. 2012 Feb; 91(2):98-106.AJ

Abstract

OBJECTIVE

Patellar malalignment is a major cause of patellofemoral pain syndrome (PFPS), but the relationship between clinical symptoms and changes in patellar position and knee muscle strength has not been confirmed. This study examined the effect of weight training on hip and knee muscle strength, patellofemoral joint contact area, and patellar tilt on subjects with and without PFPS, hoping to develop an optimal rehabilitation protocol for subjects with PFPS.

DESIGN

The study uses a prospective independent group comparison. Fifteen subjects with and without PFPS were assessed for knee strength, patellofemoral joint contact area, and patellar tilt angle using magnetic resonance imaging. The subjects with PFPS were also examined and given a numeric pain rating score and a Kujala patellofemoral score. The subjects performed lower-limb weight training 3 times/wk for 8 wks, and the outcomes were assessed both before and after training.

RESULTS

Subjects with PFPS have increased their patellofemoral joint contact area after weight training (P < 0.001). No statistical significant change was found on the patellar tilt angle. The isometric and isokinetic knee strength in subjects with and without PFPS have increased after weight training (P value increased from 0.007 to 0.05). Both numeric pain rating and Kujala patellofemoral score in the PFPS group improved after training (P < 0.001).

CONCLUSIONS

Weight-training exercise increased knee muscle strength and the patellofemoral joint contact area, which could reduce mechanical stress in the joint, improving pain and function in subjects with PFPS.

Authors+Show Affiliations

Department of Rehabilitation Sciences, Hong Kong Polytechnic University.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22248804

Citation

Chiu, Joseph K W., et al. "The Effects of Quadriceps Strengthening On Pain, Function, and Patellofemoral Joint Contact Area in Persons With Patellofemoral Pain." American Journal of Physical Medicine & Rehabilitation, vol. 91, no. 2, 2012, pp. 98-106.
Chiu JK, Wong YM, Yung PS, et al. The effects of quadriceps strengthening on pain, function, and patellofemoral joint contact area in persons with patellofemoral pain. Am J Phys Med Rehabil. 2012;91(2):98-106.
Chiu, J. K., Wong, Y. M., Yung, P. S., & Ng, G. Y. (2012). The effects of quadriceps strengthening on pain, function, and patellofemoral joint contact area in persons with patellofemoral pain. American Journal of Physical Medicine & Rehabilitation, 91(2), 98-106. https://doi.org/10.1097/PHM.0b013e318228c505
Chiu JK, et al. The Effects of Quadriceps Strengthening On Pain, Function, and Patellofemoral Joint Contact Area in Persons With Patellofemoral Pain. Am J Phys Med Rehabil. 2012;91(2):98-106. PubMed PMID: 22248804.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effects of quadriceps strengthening on pain, function, and patellofemoral joint contact area in persons with patellofemoral pain. AU - Chiu,Joseph K W, AU - Wong,Yiu-Ming, AU - Yung,Patrick S H, AU - Ng,Gabriel Y F, PY - 2012/1/18/entrez PY - 2012/1/18/pubmed PY - 2012/4/5/medline SP - 98 EP - 106 JF - American journal of physical medicine & rehabilitation JO - Am J Phys Med Rehabil VL - 91 IS - 2 N2 - OBJECTIVE: Patellar malalignment is a major cause of patellofemoral pain syndrome (PFPS), but the relationship between clinical symptoms and changes in patellar position and knee muscle strength has not been confirmed. This study examined the effect of weight training on hip and knee muscle strength, patellofemoral joint contact area, and patellar tilt on subjects with and without PFPS, hoping to develop an optimal rehabilitation protocol for subjects with PFPS. DESIGN: The study uses a prospective independent group comparison. Fifteen subjects with and without PFPS were assessed for knee strength, patellofemoral joint contact area, and patellar tilt angle using magnetic resonance imaging. The subjects with PFPS were also examined and given a numeric pain rating score and a Kujala patellofemoral score. The subjects performed lower-limb weight training 3 times/wk for 8 wks, and the outcomes were assessed both before and after training. RESULTS: Subjects with PFPS have increased their patellofemoral joint contact area after weight training (P < 0.001). No statistical significant change was found on the patellar tilt angle. The isometric and isokinetic knee strength in subjects with and without PFPS have increased after weight training (P value increased from 0.007 to 0.05). Both numeric pain rating and Kujala patellofemoral score in the PFPS group improved after training (P < 0.001). CONCLUSIONS: Weight-training exercise increased knee muscle strength and the patellofemoral joint contact area, which could reduce mechanical stress in the joint, improving pain and function in subjects with PFPS. SN - 1537-7385 UR - https://www.unboundmedicine.com/medline/citation/22248804/The_effects_of_quadriceps_strengthening_on_pain_function_and_patellofemoral_joint_contact_area_in_persons_with_patellofemoral_pain_ L2 - https://doi.org/10.1097/PHM.0b013e318228c505 DB - PRIME DP - Unbound Medicine ER -