I have been biking for a couple of month now commuting to work 3-4 times a week plus the occasional weekend ride to ran errands.
My commute to work is 15Kilometers and relatively easy but on the way back I have 5K hill which is pretty taxing.
Now me and my wife both noticed that my upper body is getting more buffed though I have not been to the gym at all .
I know it sounds silly , but does your upper body get worked at all when you are biking ? could the hill be causing this?
I am just a little puzzled so I appreciate any feedbacks.