A macro-rational can now be proposed for prescribing conservative therapies. We must refer to Fig. 8.1 , which schematises the CoVin model. This model, as we have seen, is quite simple. I will not discuss pharmacological therapy further, which can be a valuable complement to mechanical interventions. Nor will I only return to surgical treatments, which are within the competence of physiatry and physiotherapy for some of their outcomes.