Why do Olympic divers get in a small pool after they dive?
In this case, it’s all about protecting their muscles. Coming out of the pool after a dive and onto the air-conditioned pool deck can be chilly and cause their muscles to tense up, so divers will typically rinse off with warmer water than they dove into, sometimes taking a dip into a hot tub as well. Rather than stand in the cold for an extended period of time between dives, divers will use showers to keep themselves and, most importantly, their muscles warm and limber.