At the gym, slowing things down or kicking them into a higher gear is as easy as hitting a button. How do you do that in the real world where there are no buttons to press or knobs to twist? Actually, it’s easier than you think. You just need to learn a few basic principles. 1. No rest for the wicked. The shorter you rest in between exercises, the tougher those exercises get. If your usual rest time is a minute and a half in between sprints or push-ups or step-ups, take it down to a minute and you will notice your second and third set feeling a whole lot harder. 2. It’s all about ...