I swim with my fingers together, thumb at the side and a slightly cupped hand.
I have seen some people in my pool swimming with small gaps between their fingers, which I found interesting (I have always been taught the way I currently swim as above).
As the hands make up a fairly substantial amount of propulsion, I was wondering if it is worth changing my form. My question is principally, is it faster to swim with slightly spaced fingers, but I would also be interested in if anyone has attempted to quantify the difference in hand/finger/thumb position.
Thank you in advance for any help you can give.