The main functions of the diaphragm are altered in the presence of respiratory diseases, due to a reduction in muscle mass and electrical coordination, and a nonphysiological adaptation of the intrinsic protein structure. Patients with COPD or OSAS, and people weaned from ventilation machines follow a rehabilitation path and physiotherapy to recover the diaphragm strength, combining manual and osteopathic therapy with specificic techniques which can be directly used on the rib muscle. The operator manually evaluates the mobility of the diaphragm before and after physiotherapy; the initial evaluation is useful to address the training, and the final one to evaluate the outcome.In literature a manual assessment of the less mobile areas of the diaphragm is currently missing, these information would be vital for the operators, in order to decide which muscle areas need to be treated. The scale proposed in the present article can be useful to address the treatment on specific affected areas and can improve informational exchange on the patient's specific needs between different professional persons. The article is the first step to present the scale as a hypothesis. Subsequently, we will make a second article to validate the scale with objective clinical tools.