I never stream fitness classes, but I bought this product called the Katalyst, and it}s an electric stimulation suit that you put on. You have to buy a subscription to use it, so I signed in to watch some guy do squats and tell me how to do things. I didn’t pay attention as much as I should. But it definitely had my muscles sore. It feels like you’re buzzing, like a jolt, but not uncomfortable. It’s just like, Oh, that’s working. Oh, that’s tightening my muscles. Usually, I play tennis, weight train, or do Pilates.