Acl Reconstruction Exercises

I had my ACL reconstruction surgery a little over a week ... It is still quite sore and stiff, but sitting on the couch all day is killing me and I was wondering if people know cardio exercises to get the heart pumping without hurting / using my leg?

if you had money you could buy a circle because ab
The only pressure is applied on your knees.
but for swimming everyday situation or machine Cycling
would be your best bet.