Anu M Valtonen1, Tapani Pöyhönen2, Mikko Manninen3, Ari Heinonen4, Sarianna Sipilä5. 1. Department of Human Movement and Functioning, Helsinki Metropolia University of Applied Sciences, Helsinki, Finland; Rehabilitation and Pain Unit, Kymenlaakso Central Hospital, Carea, Kotka, Finland. Electronic address: anu.valtonen@metropolia.fi. 2. Rehabilitation and Pain Unit, Kymenlaakso Central Hospital, Carea, Kotka, Finland. 3. Orthopaedic Department, Orton Hospital, Helsinki, Finland. 4. Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland. 5. Gerontology Research Center, Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland.
Abstract
OBJECTIVES: To determine the extent of asymmetrical deficits in knee extensor and flexor muscles, and to examine whether asymmetrical muscle deficits are associated with mobility limitations in persons with late-stage knee osteoarthritis (OA). DESIGN: Cross-sectional. SETTING: Research laboratory. PARTICIPANTS: A clinical sample (N=56; age range, 50-75y) of eligible persons with late-stage knee OA awaiting knee replacement. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Knee extensor and flexor power and torque assessed isokinetically; thigh muscle cross-sectional area (CSA) assessed by computed tomography; mobility limitation assessed by walking speed and stair ascension time; and pain assessed with the Western Ontario and McMaster Universities Osteoarthritis Index questionnaire. RESULTS: The asymmetrical deficits in knee extensor and flexor power and torque were between 18% and 29% (P<.001). Regarding the thigh muscle CSA, the asymmetrical deficit was 4% (P<.001). Larger asymmetrical knee extensor power deficits and weaker knee extensor and flexor power on the contralateral side were associated with slower stair ascension times. Moreover, weaker knee extensor and flexor power on the ipsilateral side were associated with slower stair ascension times. Greater knee pain in the OA joint was independently associated with slower stair ascending time in both models. CONCLUSIONS: The knee extensor and flexor muscle power of both the ipsilateral and contralateral sides and the pain in the OA knee were independently associated with stair ascension times. These results highlight the importance of assessing muscle power on both sides and knee pain in the prevention of mobility limitations in patients with knee OA.
OBJECTIVES: To determine the extent of asymmetrical deficits in knee extensor and flexor muscles, and to examine whether asymmetrical muscle deficits are associated with mobility limitations in persons with late-stage knee osteoarthritis (OA). DESIGN: Cross-sectional. SETTING: Research laboratory. PARTICIPANTS: A clinical sample (N=56; age range, 50-75y) of eligible persons with late-stage knee OA awaiting knee replacement. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Knee extensor and flexor power and torque assessed isokinetically; thigh muscle cross-sectional area (CSA) assessed by computed tomography; mobility limitation assessed by walking speed and stair ascension time; and pain assessed with the Western Ontario and McMaster Universities Osteoarthritis Index questionnaire. RESULTS: The asymmetrical deficits in knee extensor and flexor power and torque were between 18% and 29% (P<.001). Regarding the thigh muscle CSA, the asymmetrical deficit was 4% (P<.001). Larger asymmetrical knee extensor power deficits and weaker knee extensor and flexor power on the contralateral side were associated with slower stair ascension times. Moreover, weaker knee extensor and flexor power on the ipsilateral side were associated with slower stair ascension times. Greater knee pain in the OA joint was independently associated with slower stair ascending time in both models. CONCLUSIONS: The knee extensor and flexor muscle power of both the ipsilateral and contralateral sides and the pain in the OA knee were independently associated with stair ascension times. These results highlight the importance of assessing muscle power on both sides and knee pain in the prevention of mobility limitations in patients with knee OA.
Authors: So Young Lee; Bo Ryun Kim; Sang Rim Kim; Jun Hwan Choi; Eui Jin Jeong; Jinseok Kim Journal: Medicine (Baltimore) Date: 2022-08-05 Impact factor: 1.817
Authors: José Casaña; Joaquín Calatayud; Antonio Silvestre; José Sánchez-Frutos; Lars L Andersen; Markus D Jakobsen; Yasmín Ezzatvar; Yasser Alakhdar Journal: Int J Environ Res Public Health Date: 2021-03-31 Impact factor: 3.390