How is there no way to enjoy it? I used to be extremely nonathletic. Then I realized people weren't just born athletes, there is no unwritten rule someone that appears pretty nerdy as me can't be healthy and exercise. Its surprisingly fun, and you get the satisfaction of knowing a lot of people don't know about this fun secret.
I run and lift weights. Just listen to some intense music and get into it. I always feel great after lifting, and I love being tired at the end of the day.
I typically run when the sun shines hottest and its humid in the middle of the day. I love that its so brutal and hard. I compare it to life as a whole. Life is brutal and hard, and how do I want to approach it?
Fearlessly, tirelessly, and maybe even viciously. So that is how I approach my running. Relentlessly and fearlessly. Am I sweating madly and want to quit half a mile in? Yes, but I'm sure America wasn't built because the patriots gave up halfway, so I won't either. Am I scared I'm going to pass out in this heat? Yeah, but thats being fearful and making an excuse. Excuses are for people who fail at their goals and don't want to man up to it, I don't want to be like that, so I won't be that way in my run. I also don't want to go through life being fearful. Fear is an excuse. I'm sure Alexander the great was fearful of venturing into India, but I'm also sure he didn't let that fear deter him from greater glory. So I won't either.
See where I'm going with this motivation thing? Just have fun with it.