Indoor spin cycling has become my new obsession. I currently go to classes at GB3 in the morning where we warm up and have an instructor lead a class. You can go at your own pace and raise your resistance as you feel comfortable. After just three weeks of taking classes six days a week, I can already feel my legs getting strong, my arms getting toner, and seeing an increase in my milage. I advise you to try this new kind of workout and if you need a cycling buddy, let me know!
Here is an example of a workout: https://www.youtube.com/watch?v=Wd9VxqWxPuw