How can I still work out with a terrible ankle sprain?

I joined the YMCA and started working out. I’d been so happy because I’d been working out everyday and had lost about 21 pounds. Tuesday I rolled my ankle on my way to the Y and have been laid up ever since. It’s like one of those deals where I’d have been better off breaking my ankle instead of spraining it. It’s still totally swelled up and a nice shade of green and purple. I can’t work, because I can barely bear weight. Any ideas on what I can do to continue my work out while I’m laid up? I’m guessing I could still do strength training even if I can’t do cardio. Any ideas?