As the season of fall welcomes possibly the most natural time of transition with the leaves turning various colors and the weather cooling off, you might be contemplating making changes to your own life. When it comes to routine exercise, it’s so easy to often find yourself falling into a rut. If you’re looking to upgrade your workout routine for the better, don’t miss these 6 must-try ideas: Try Cross-Training So many fitness injuries occur simply from overuse and for athletes like long distance runners, cross-training couldn’t be…