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- W2053352519 abstract "ObjectiveTo investigate (1) the effect of running and drop landing interventions on knee cartilage deformation and serum cartilage oligomeric matrix protein (COMP) concentration and (2) if the changes in cartilage volume correlate with the changes in serum COMP level.MethodsKnee joint cartilage volume and thickness were determined using magnetic resonance imaging (MRI) as well as COMP concentration from serum samples before and after in vivo loading of 14 healthy adults (seven male and seven female). Participants performed different loading interventions of 30 min duration on three different days: (1) 100 vertical drop landings from a 73 cm high platform, (2) running at a velocity of 2.2 m/s (3.96 km), and (3) resting on a chair. Blood samples were taken immediately before, immediately after and 0.5 h, 1 h, 2 h and 3 h post intervention. Pre- and post-loading coronal and axial gradient echo MR images with fat suppression were used to determine the patellar, tibial and femoral cartilage deformation.ResultsSerum COMP levels increased immediately after the running (+30.7%, pre: 7.3 U/l, 95% confidence interval (CI): 5.6, 8.9, post: 9.1 U/l, 95% CI: 7.2, 11.0, P=0.001) and after drop landing intervention (+32.3%, pre: 6.8 U/l, 95% CI: 5.3, 8.4; post: 8.9 U/l, 95% CI: 6.8, 10.9, P=0.001). Cartilage deformation was more pronounced after running compared to drop landing intervention, with being significant (volume: P=0.002 and thickness: P=0.001) only in the lateral tibia. We found a significant correlation (r2=0.599, P=0.001) between changes in serum COMP (%) and in cartilage volume (%) after the drop landing intervention, but not after running.ConclusionsIn vivo exercise interventions differentially regulate serum COMP concentrations and knee cartilage deformations. The relation between changes in COMP and in cartilage volume seems to depend on both mechanical and biochemical factors." @default.
- W2053352519 created "2016-06-24" @default.
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- W2053352519 date "2011-08-01" @default.
- W2053352519 modified "2023-10-17" @default.
- W2053352519 title "Deformational behaviour of knee cartilage and changes in serum cartilage oligomeric matrix protein (COMP) after running and drop landing" @default.
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- W2053352519 doi "https://doi.org/10.1016/j.joca.2011.04.012" @default.
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