* presence of comorbidities of musculoskeletal origin that contraindicate the practice of the proposed exercise. * presence of uncontrolled cardiac or respiratory disease. * presence of incapacitating neurological disease that significantly interferes with the proposed exercise activity severe anaemia or other co-morbidities that significantly interfere with the proposed exercise activity * diagnosis or symptoms of dysautonomia * presence of high rates of fatigue * desaturations during the exercise test that imply a need for oxygen supply for exercise * desaturation on exertion during exercise ≥3%.

* presence of comorbidities of musculoskeletal origin that contraindicate the practice of the proposed exercise. * presence of uncontrolled cardiac or respiratory disease. * presence of incapacitating neurological disease that significantly interferes with the proposed exercise activity severe anaemia or other co-morbidities that significantly interfere with the proposed exercise activity * diagnosis or symptoms of dysautonomia * presence of high rates of fatigue * desaturations during the exercise test that imply a need for oxygen supply for exercise * desaturation on exertion during exercise ≥3%.

presence of comorbidities of musculoskeletal origin that contraindicate the practice of the proposed exercise. presence of uncontrolled cardiac or respiratory disease. presence of incapacitating neurological disease that significantly interferes with the proposed exercise activity severe anaemia or other co-morbidities that significantly interfere with the proposed exercise activity diagnosis or symptoms of dysautonomia presence of high rates of fatigue desaturations during the exercise test that imply a need for oxygen supply for exercise desaturation on exertion during exercise ≥3%.

presence of comorbidities of musculoskeletal origin that contraindicate the practice of the proposed exercise. presence of uncontrolled cardiac or respiratory disease. presence of incapacitating neurological disease that significantly interferes with the proposed exercise activity severe anaemia or other co-morbidities that significantly interfere with the proposed exercise activity diagnosis or symptoms of dysautonomia presence of high rates of fatigue desaturations during the exercise test that imply a need for oxygen supply for exercise desaturation on exertion during exercise ≥3%.