I Have A New Exercise Bike And Have Been Using

I have a new exercise bike and have been using it 3-4 times a day/just for a few minutes. Have been using it for about 5 days now. I had to stop using it due to ankle/toe/and foot cramps keeping me up at night when I am laying down/up at least 8-10 times a night trying to walk it off. Cannot walk much either due to the same reasons. Any suggestions.