Actually it’s an incomplete headline. Not only does cycling aggravate back pain, it also sometimes is the sole cause for it! For people who think cycling is the best form of exercise, it helps all body parts to get their share of exercise and movement, helps breathing etc are thinking right but partly so.
Cycling does all the above but when its done correctly. In correct rhythm, in correct posture and for a short time. Honestly, how many of us really know the difference between the right ways of cycling from the wrong?