![Men's Health Live show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/052/385/small/men-s-health-live.jpg)
Summary: Even if you're a gym rat, one of the most dangerous things you could do to your back is bend over to pick up a bag of groceries out of the trunk of your car. Using unstable implements while training can make your body more efficient. Ultimate Sandbag Training CEO, Josh Henkin tells us more.