Today’s the second time you’re going through this workout. Last week, you got a taste of what Phase 3 HIIT with weights is all about. Today, you’ll kick things up a notch by adding some more weight to the bar. Remember, just because you’re going heavier doesn’t mean you get to slack on the rest periods. I like to use my stopwatch to make sure I take exactly 20 seconds between sets—no more, no less.
Short rest breaks might shock your system and leave you winded for a moment, but in the end, they’ll lead to more calories burned, improved performance, and maximal muscle growth.