One article on PainSci cites Thijs 2011: The Complete Guide to Patellofemoral Pain Syndrome
PainSci commentary on Thijs 2011: ?This page is one of thousands in the PainScience.com bibliography. It is not a general article: it is focused on a single scientific paper, and it may provide only just enough context for the summary to make sense. Links to other papers and more general information are provided wherever possible.
Contrary to a trendy theory, this study specifically looked for and could not find a causal connection between hip strength and runner’s knee: “there was no significant difference in strength of any of the assessed hip muscle groups between the runners who did and did not develop patellofemoral dysfunction syndrome.” There are other considerations, but the study is of good quality (for a cohort) study, and I have confidence in at least one clear implication of the results: based on this data, hip weakness is not predictive of anterior knee pain in middle aged female runners.
Incidentally, they also eliminated several other causal contenders: according to their data, Q-angles, age, and weight/BMI were all irrelevant to developing pain.
~ Paul Ingraham
original abstract †Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.
BACKGROUND: Hip muscle weakness has been proposed to contribute to patellofemoral malalignment and the development of the patellofemoral dysfunction syndrome (PFDS). However, from the retrospective studies that have addressed this issue, it is still unclear if hip muscle weakness is a cause or a consequence of PFDS.
PURPOSE: This study was undertaken to investigate if hip muscle weakness is a predisposing factor for the development of PFDS.
STUDY DESIGN: Cohort study (prognosis); Level of evidence, 2.
METHODS: Before the start of a 10-week "start to run" program, the isometric strength of the hip flexor, extensor, abductor, adductor, and external and internal rotator muscles was measured in 77 healthy female novice runners. During the 10-week training period, patellofemoral pain was diagnosed and registered by an orthopaedic surgeon.
RESULTS: Statistical analysis revealed that there was no significant difference in strength of any of the assessed hip muscle groups between the runners who did and did not develop PFDS. Logistic regression analysis did not identify a deviation in strength of any of the assessed hip muscle groups as a risk factor for PFDS.
CONCLUSION: The findings of this study suggest that isometric hip muscle strength might not be a predisposing factor for the development of PFDS.
- “Is hip strength a risk factor for patellofemoral pain? A systematic review and meta-analysis,” M S Rathleff, C R Rathleff, K M Crossley, and C J Barton, British Journal of Sports Medicine, 2014.
This page is part of the PainScience BIBLIOGRAPHY, which contains plain language summaries of thousands of scientific papers & others sources. It’s like a highly specialized blog. A few highlights:
- The CANBACK trial: a randomised, controlled clinical trial of oral cannabidiol for people presenting to the emergency department with acute low back pain. Bebee 2021 Med J Aust.
- Relationships Between Sleep Quality and Pain-Related Factors for People with Chronic Low Back Pain: Tests of Reciprocal and Time of Day Effects. Gerhart 2017 Ann Behav Med.
- Modulation in the elastic properties of gastrocnemius muscle heads in individuals with plantar fasciitis and its relationship with pain. Zhou 2020 Sci Rep.
- Association Between Plantar Fasciitis and Isolated Gastrocnemius Tightness. Nakale 2018 Foot Ankle Int.
- A Bayesian model-averaged meta-analysis of the power pose effect with informed and default priors: the case of felt power. Gronau 2017 Comprehensive Results in Social Psychology.