I pedal an exercise peddler that sits on the floor. It's like a stationary bike without wheels. You can do it while sitting in a chair or sofa.

Here's a video. Although blasting a loud stereo isn't exactly a quiet environment. But it is good exposure. Instagram: "This is how I exercise. I pedal an exercise bike while listening to music. Since the stereo is inside, I have to crank it way up to hear it on the patio!"