Crossfit is the way to go!
Just ran the Ouchita Trail 50. I ran the 50k option this year and finished 5th overall and 2nd master. Thanks to all of my sponsors, Rush Running and Crossfit NWA. If you haven't tried Crossfit you are missing out. Since starting Crossift I have set PR's at three different distances. It is an awesome total body workout that is designed to make you stronger, faster and more durable!