The best part about the summer to me is going swimming in the fresh water pool and having fun.
I love to go swimming, my brother is insanely fast in a pool, I am not very fast, but still like to go from time to time!
My husband i s to he was a lifeguard in his teenage years so he can hold his breath for a long time and swim fast.
I can hold my breath for like a maximum of 25 seconds before I am ready to pass out, I am built to swim fast but never practiced much
I can hold my breath long but not swim super fast swimming fast relies on your body buoyancy. 
I think I float okay, I just never developed the muscles for it 
The body can float very easy long as you have a density of 0.98 which we do in water.