The problem with cycling is that bits of bikes are always breaking, need cleaning or in need of other TLC, my bike currently awaiting parts in the post. But so long as you don't fall off then injuries seem rare.
The problem with running is that my body is always breaking or in need of TLC, currrently achilles repairs (no new parts availble). But running kit tends not to break, doesn't need cleaning and lasts for years. Other than shoes.