Now I'll admit that I'm not very fast, I usuallu cruise around on the street between 15 and 17 mph, but lately I've been going a bit slower.
A friend of mine was injured in a motorcycle accident last summer, and he has recovered onough to walk around with a crutch, but he only has partial use of his right leg. I've been taking him cycling to get him outdoors, active, and build his leg strength back up. Now, due to his leg, he's not very fast. We cruise around at 10-12mph most of the time.
What I'm wondering is, while we're doing this - do I burn as many calories, or build as much muscle as I would going faster (assuming we went the same distance)? We usually ride 15-20 miles. Is 15 miles at 12mph going to be significantly less beneficial than 15 miles at 16mph?
I'm wondering how many other rides I should try to do between riding with my friend.