I try to commute three days a week. My commute is 14.5 miles each way which I ride in about 55 minutes. As I do not need a recovery day, I would commute 5 days a week, but my wife does not like that I get home late for supper, (its a long story), and, as it is routinely over 100 degrees in the afternoon here in DFW, Texas, obviously, I need an additional 15 to 20 minutes to shower after getting home. However, like the OP, I love riding and, at 61 years old, enjoy the benefits of the exercise. I am not on any prescription medications and measured my blood pressure last night at 105 over 59 with a heart rate in the low sixties.