Just recreational swimming, but like you say, we're doing a lot of it. The kids mostly stay in the shallow water since they are playing, and one of the younger girls isn't a very strong swimmer, but I have always loved swimming in as deep of water as I can find. When there are no boats on the lake, I'll swim out pretty far and stay there for quite a while, so even when I'm not swimming I'm treading water. My adult sister doesn't swim much, since she has this condition where when she gets cold, especially if it's a shock of cold, all the blood leaves her fingers and then her hands, and leaves them feeling numb and freezing for like hours afterward. I think it's called Reynaud's syndrome. So she typically just sits on the shore and reads while we swim.