Study finds, Biomechanical Stress in the context of competit
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A Study was conducted to evaluate the influence of mechanical stress on the development of immediate enthesitis.

The BEAT study is an interventional study that has evaluated the entheses of competitive badminton players before and immediately following a 60-minute rigorous workout. In the insertion sites of the Achilles tendon, patellary tendon and lateral humeral epicondyls, the changes of Power Doppler (PD) and Gray Scale (GS) were measured and quantified using a revised scoring system.

Results:
--32 badminton players were included. 192 entheseal sites were examined twice. The respective empirical total scores for PD examination were 0.1 (0.3) before and 0.5 (0.9) after training.

--Mean total GS scores were 2.9 and 3.1 before and after training, respectively.

--The mean total PD score difference of 0.4 between pre- and post-training was significant whereas no significant difference for the mean total GS score was observed.

--Overall, 7 participants showed an increased empirical total PD score. A mixed effects model showed a significant increase of PD scores after training, with a mean increase per site of 0.06.

In conclusion, mechanical stress results in quick inflammatory reactions in human entheses. These data support the hypothesis of enthesitis-related mechanoinflammation.

Source: https://arthritis-research.biomedcentral.com/articles/10.1186/s13075-021-02530-x
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