TY - JOUR

T1 - The association between submaximal quadriceps force steadiness and the knee adduction moment during walking in patients with knee osteoarthritis

AU - Sørensen, Tina Juul

AU - Langberg, Henning

AU - Aaboe, Jens

AU - Bandholm, Thomas

AU - Bliddal, Henning

AU - Henriksen, Marius

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

KW - Aged

KW - Cross-Sectional Studies

KW - Female

KW - Humans

KW - Isometric Contraction

KW - Knee Joint

KW - Male

KW - Middle Aged

KW - Osteoarthritis, Knee

KW - Quadriceps Muscle

KW - Walking

U2 - 10.2519/jospt.2011.3481

DO - 10.2519/jospt.2011.3481

M3 - Journal article

C2 - 21765221

VL - 41

SP - 592

EP - 599

JO - Journal of Orthopaedic and Sports Physical Therapy

JF - Journal of Orthopaedic and Sports Physical Therapy

SN - 0190-6011

IS - 8

ER -