Almost nine years ago I was in an accident where I suffered traumatic brain injury. One of the several effects was constant vertigo. Riding a bicycle was difficult and so my wife and I bought Catrike brand recumbent tricycles at Easy Street Recumbents in Austin Texas. It was truly surprising how much fun these things are to ride. You lean back in a chair with your feet out in front of you. Your butt is about 6 inches above the road. Being over 60 years old riding anything that requires peddaling becomes tiring so we added Bionx brand electric motors and Lithium ion batteries.
The motors provide assist when you peddle. If you press the boost button the motor will propel you up to 20 mph for a short time without any peddling. Without the boost you can exceed 20 mph if, you are young, you have strong legs or you are going down hill. We have very little in the way of hills here in southern Louisiana so we rarely exceed 20 mph. I do recommend electric recumbent tricycle. If you live in hilly country be careful. I’ve heard of a 70 year old man in the Texas hill country young over 50 miles an hour down the hills (without any electric assist). If you go down a hill then you might have to go back up a hill. That can be very tiring for us old guys.