I've been out of shape for several years, but finally starting to get back into exercising.
I've been doing pretty heavy aerobic exercises for the past two months. For the most part, I'm doing ok - not in tip-top shape yet, but definitely doing a lot better than I have in years.
One thing that still gets me - whenever I try to do push-ups (or anything else where I'm facing the floor), I seem to have a lot of trouble. It's hard to describe, but it just seems like I'm not able to breathe right, and I lose energy fast. I can run, jump, do all kinds of things standing up, but as soon as I hit the floor I'm only good for a few seconds before I crash or have to stand up.
Is this common, or indicative of any problem? Or do you think it's just something I need to work through and gradually learn how to overcome?