Figure 1From: Serum levels of Cartilage Oligomeric Matrix Protein (COMP) increase temporarily after physical exercise in patients with knee osteoarthritis Study design. Blood-sampling procedures during the study from study baseline at -3 weeks to the end of the study at 24 weeks. Blood samples were obtained before and after 60 minutes exercise/rest at each occasion. The arrows indicates blood-sampling occasions. Two blood-samples at each occasions, with an hour apart.Back to article page