morningstar
Cathlete
It doesn't really matter what time other people wake up to work out - it's your own circadian rhythym that you have to convince to change. How to do it? Just do it. Go to bed early (take a melatonin if you have to to reset your sleep cycle to the earlier time) and wake up early at the same time every single day. Don't allow yourself to go back to sleep. Just get up and start working out, without negotiating with yourself about whether you will or won't get up. You will wake up fully after a little while and by that time you will already be doing the workout and you'll feel awesome when you're done. Then, lather, rinse, repeat. You'll get used to it after a week or so and in the meantime, suck it up, buttercup and tell yourself that you'll feel better soon.