A photo on twitter reveals the truth: Marquez's problem is not the fractured humerus but a lack of mobility of the right shoulder. A painful condition that limits mobility.
The exercise shown in the picture is in fact performed to force the shoulder joint. The most common problems of a very stressed shoulder are various: adhesive capsulitis, rotator cuff problems, glenoid rim injury etc.. All these problems can be solved with an operation, but they can become chronic, making it difficult, if not impossible, to perform certain movements that, if sudden, cause a lot of pain, since the shoulder is a very innervated region. And we add that it is very busy riding a motorcycle.