For years now I've been jumping into an ice bath after my long rides/runs. My coach got me doing this, and it really does speed recovery. Since I have a pool now I just go stand in my unheated freezing cold pool. I try to stay in as long as possible, but can barely make it five minutes. It hurts. But it really helps with recovery. On the rare occasion that I don't have time to do it, I'm really sore the next day.