Today on the First 40 Miles, your car has a mechanic, but when it comes to good body mechanics, it’s all up to you.  Find out how to prevent injury in today’s top 5 list.  Then on the SUMMIT Gear Review, a piece of backpacking clothing that goes before the base layer.  Next, a zero gram solution that will support your lower back while you’re taking a quick break.  And we’ll wrap up the show with a little trail wisdom from the Bible.