Peloton is a bonafide fitness phenomenon — it has a million impassioned users to whom its bikes and original streaming workouts are a way of life, making it much more than a company that sells exercise equipment, though it does that too. In fact, Peloton has sold over 400,000 bikes so far and started delivering its first treadmills in late 2018, the company tells CNBC Make It. Peloton is changing the way America works out.

"People are pretty obsessed with Peloton — myself included," Robin Arzon, Peloton's head instructor and vice president of fitness programming, tells CNBC Make It. Arzon joined in 2014 after reading an article about Peloton that made her feel like she was seeing the future of fitness.