<![CDATA[Journal of Orthopaedic & Sports Physical Therapy - Henning Langberg, PT, MSc, PhD]]> http://www.jospt.org/henninglangberg en-us (c) 2011 Wed, 30 Apr 2008 09:05:25 EST http://feedvalidator.org/docs/rss2.html www.eResources.com (Generator) jospt@eresources.com (JOSPT) jospt@eresources.com (eResources) 0 The Association Between Submaximal Quadriceps Force Steadiness and the Knee Adduction Moment During Walking in Patients With Knee Osteoarthritis http://www.jospt.org/issues/articleID.2609/article_detail.asp Tina Juul Sørensen, Henning Langberg, Jens Aaboe, Thomas Bandholm, Henning Bliddal, Marius Henriksen

STUDY DESIGN: Cross-sectional study. OBJECTIVES: To investigate the relationship between quadriceps force steadiness and knee adduction moment during walking in patients with knee osteoarthritis (OA). BACKGROUND: Studies have shown that quadriceps force steadiness is impaired in patients with knee OA. Furthermore, patients with knee OA, compared to healthy controls, have also demonstrated a significantly higher external knee adduction moment during walking. However, no studies have examined the relationship between quadriceps force steadiness and the peak knee adduction moment during walking in this population. METHODS: Forty-one patients with knee OA (34 females and 7 males) were included in the study. Submaximal isometric quadriceps force steadiness was measured during a force target-tracking task. Peak knee adduction moments during ambulation were measured using a 3-dimensional gait analysis system, and knee pain was assessed using the Knee Injury and Osteoarthritis Outcome Score (KOOS) pain subscale and a visual analog scale. RESULTS: Regression analyses showed that quadriceps force steadiness did not predict the peak knee adduction moment (adjusted R2 = 0.05, P = .41). Inclusion of covariates did not change the outcome. CONCLUSION: No statistically significant association between submaximal isometric quadriceps force steadiness and peak knee external adduction moments during walking was found. It could be speculated that submaximal isometric quadriceps muscle force steadiness and knee joint loads during walking represent 2 distinctive pathways and may have independent influences on knee OA pathogenesis.

J Orthop Sports Phys Ther 2011;41(8):592-599, Epub 12 July 2011. doi:10.2519/jospt.2011.3481

KEY WORDS: gait, knee OA, motor control, tibiofemoral joint

]]> Tue, 12 Jul 2011 00:00:00 EST http://www.jospt.org/issues/articleID.2609/article_detail.asp Reliability and Normative Values of the Foot Line Test: A Technique to Assess Foot Posture http://www.jospt.org/issues/articleID.1324/article_detail.asp Christoffer Brushøj, Henning Langberg, Klaus Larsen, Michael Bachmann Nielsen, Per Hölmich
STUDY DESIGN: Test-retest reliability. OBJECTIVE: To examine the reliability and report normative values of a novel test, the foot line test (FLT), to describe foot morphology. BACKGROUND: Numerous foot examinations are performed each day, but most existing examination techniques have considerable limitations regarding reliability and validity. METHODS AND MEASURES: One hundred thirty subjects with mean foot size 44 (41-50 European size) participated. Two examiners, blinded to each other's measurements, measured the right foot of the subjects twice and the left foot once. The position of the most medial aspect of the navicular in the mediolateral direction was projected vertically onto a piece of paper placed under the subject's foot, and compared to the position of the forefoot and hindfoot to obtain the FLT value. RESULTS: FLT values ranged from -8 to 14mm, with a mean (±SD) of 3.7 ± 3.4. The intratester reproducibility reported by SEM was 0.8 mm for tester 1 and 0.9 mm for tester 2, while intertester SEM was 1.4 mm for the right foot and 1.3 mm for the left foot. The intrarater ICC was 0.95 for tester 1 and 0.94 for tester 2, while the interrater ICC was 0.86 (left foot) and 0.83 (right foot). There was no significant association between foot size and FLT values. CONCLUSION: The FLT is a reproducible technique to assess foot posture.

J Orthop Sports Phys Ther 2007;37(11):703-707, published online 12 July 2007. doi:10.2519/jospt.2007.2525

KEY WORDS: classification, examination technique, foot morphology, navicular position

]]> Thu, 12 Jul 2007 00:00:00 EST http://www.jospt.org/issues/articleID.1324/article_detail.asp