The invisible insuline is what they call exercise. My family has a history of diabetes, and I didn't want to become diabetic. So, I was doing 30 to 45 minutes of laps daily for two years. Never missed a day. And I looooooved it. But I was afraid that if I didn't do something else to exercise daily, I would start to either be bored, or get tired of it eventually. So I decided to get back on a bike after ... 32 years. I am turning 50 this year, and had not rode a bike since I was 18. I started by doing some stationary bike. That lasted a whole .. two weeks. Now THAT is boring. lol Bought a bike in mid March (that is winter snow storm season where I live) and had to wait until late April to ride it outdoors. And I have used my bike for a daily commute every day since. It is pure blissful rides morning and nights, a commute in the city. A mix of bike paths, shared roads, park, back alleys, parkings. And it just pure sheer joy and fun fun fun.