Respiratory muscle 'fatigue' after long swim?
I've noticed twice now, once after a 14km open water swim and more recently after a 25km swim in a 50m outdoor pool that in addition to the normal muscle soreness the following day, I also have 'difficulty' taking deep breaths. I'm wondering if this is due to the deeper than normal breathing for extended periods of time and subsequently soliciting the diaphragm and intercostal muscles more than normal? It lasts a few days, and I'm not asthmatic. Anyone else experience this?