I recently went for a professional medical massage, and felt incredibly relaxed afterwards. He only did my torso and back, but the breathing feeling was so free I felt incredible. I sit all day in front of a computer, so my shoulders are usually quite tight - I felt like in heaven.
I could imagine, that the relaxed feeling would allow me much better control over my movement during a run, as well as breathing ability.
About 24h after though, I had quite some sores along the primary massaged muscle groups. Two days later I'm feeling fine again, but my upper body is as tense as always. So I'm wondering if a massage is a stress on the body that would interfere with the stress of a competition.
Is there any drawback to getting a massage before a competition? (I run, swim and bike, but I assume this could apply to any sports discipline).