I am really looking forward to getting in the pool eventually. I've been walking more recently (close to an hour a day), so I'm feeling more hopeful about trying different forms of exercise down the road.

The two concussion specialists I've talked to said that pool work can be good, but be careful of too much pronounced head movement (in classic freestyle, for example), at least early on. One of them also commented that swimming can involve more exertion than people think, as you're essentially hauling a large and heavy mass of water with certain strokes.