Feel lucky that you have to work out.
Think how fortunate you are to be physically capable of exercising – and that you live in a place that affords you the freedom and safety to do so. Having to force yourself to exercise is a monied person's problem. But no matter what your economic situation, if there's an hour in the day for you to work out, you're way ahead of many other people in this world. When you start looking at it as a luxury, that kind of cuts out a lot of your excuses right there.