POS1387 ULTRASOUND FINDINGS OF JOINTS AND ENTHESES FOLLOWING ONE HOUR OF AGE AND GENDER ADJUSTED WEIGHT TRAINING

Abstract

BackgroundJoint effusion and enthesitis are common ultrasound findings in rheumatologic diseases like rheumatoid arthritis or spondyloarthritis. Physically active individuals and athletes were also found to exhibit structural and vascular changes in their entheses, as well as joint effusion through different imaging approaches [1, 2].ObjectivesThe aim of this study was to evaluate the development of joint and entheseal ultrasound findings in large and medium joints of young healthy individuals after one hour of standardised weight training.MethodsA total of three musculoskeletal ultrasound examinations were performed in healthy individuals under the age of 30 years. The first examination was carried out before the individuals conducted one hour of standardized weight training, the second examination 24 hours later and the third examination 48 hours later. The examination comprised shoulder, elbow, wrist, hip, knee, and ankle joints, as well as associated entheseal sites. Poisson mixed effects models were applied to analyse the development of the ultrasound findings within 48 hours after the weight training.ResultsFifty-one healthy individuals with a mean age of 23.7 years (± 2.5, range: 19-30) (52.9% female) were enrolled in this study. Fourteen participants (27.5%) presented with at least one abnormal enthesis at baseline, increasing to 24 (47.1%) after 24 hours and to 29 (56.9%) 48 hours after the weight training. Hyperperfusion was the only entheseal pathology detected by ultrasound after the training.The number of individuals with at least one joint effusion increased from 37 (72.6%) at baseline to 45 (88.2%) after 24 hours and to 48 (94.1%) 48 hours after the weight training. The Poisson mixed effects models showed a significant increase of the number of joints with effusion and entheses with pathologies with time after the weight training (p < 0.001, Exp(b) = 1.63 and p < 0.001, Exp(b) = 1.58).ConclusionPrevalence of joint effusion in large and medium joints as well as the prevalence of entheseal pathology increase significantly within 48 hours after one hour of weight training. As a result, the individual’s physical activity should be considered when performing a musculoskeletal ultrasound examination.