<span>Muy importante porque si no sabes cómo funcionan las cosas entonces no sabremos cómo usarlo.</span>
I would say: routine. Because if you bought it to exercise and don't use it often then you would basically be wasting the money you used it on.
I think this a tough question, and I hesitated between a) and b), but I choose the second answer - Physical Therapist.
Physical Therapists are licensed providers of care, and their educational education has evolved to the point where physical therapists graduate with a doctorate in physcal therapy. Personal trainers have a degree or a certificate. This is not the same.
