I sprained my ankle six weeks ago, and I was told it was a pretty bad sprain, but they didn't tell me at the hospital what degree it was (and I didn't know to ask). They told me to follow up with an orthopedic doctor, but I didn't
: so I kind of played it by ear. I wore the splint for only a few days, took it off for a few days, put it back on for a few days. I could put weight on it after about 4-5 days, but did so minimally. After two weeks, I could walk pretty normally, and resumed doing yoga, but the swelling took a total of 4 weeks to go down (it's still a little swollen, but only I can tell).
I still haven't been able to resume step aerobics, but hope to give it a try in about 2 weeks.