the swelling is usually caused from salt imbalances and the change in osmotic pressure within your muscle cells. ie: going on full tilt for 2 hours in a tri and the water, salt changes in your muscle cause your cells to hold more water and increases swelling. it is best to leave your ring off for at least a day after a hard race. And never race with your ring on, your hands to swell to much and cut off the circulation to the finger
i’ve never heard of this change in osmotic pressure in the muscle cells before, and frankly, i’m pretty skeptical. i cannot think of a mechanism that would cause such significant changes - especially in the finger.
what were the conditions like? is it possible that you over drank?
My fingers swell up quite frequently when I race (and sometimes just in training) and it usually when I race in extreme temperatures. I never wear my wedding band during a race for this reason (that and I don’t want it to fall off when my fingers shrink in cold water swims).
I did a long alpine climb on sunday and my fingers were swelling about three hours into it. For the first three hours I was only drinking water so I took some endurolytes and the swelling almost immediately went away. Keep in mind that they can swell from too much salt as well so you should check your electrolyte balance. I would guess you need some more salt rather than less…