Just started Couch to 5K

[OakLeaf]

Breathing while running is very different from breathing while cycling. Give yourself some time to figure out the breathing. What rhythm are you using? I typically prefer to inhale three steps, exhale two when I'm running at a moderately hard pace. It can vary all the way from 5/4 at a very easy jog to 2/2 at a sprint - I really can't breathe any faster than that, but maybe that's because of my mild asthma?

Plus, anyone's maximum HR for running is always 5-10 bpm higher than for cycling - last I read a couple of years ago, exercise physiologists weren't 100% sure why, but they theorize it's a combination of weight-bearing and the cooling effect of air flow at the higher speeds of cycling.

Hope you start liking it better. But if you don't, you know, no one HAS to run. It's good to do some weight bearing, moderate to high impact activity to protect your bones, but it doesn't have to be running.