Hi Ben
I'm a Swimmer and 1 thing we have to do often is to check, our heart rate.
one thing that could eb usefule would be a a device that can check your heart rate quickly withiung 6 seconds and be waterprofe.
So you would have the device sitting on the side of the pool and in-between swimming set's you plug you finbger to a strap or sumthing, and it can output your heartrate and even other usefule fitness information
Thanks in Advance
Ab
