If the word "dropset" doesn't strike fear in your heart, you've clearly never done one of this man's workouts. Plate after plate, set after set, Charles will take your hamstrings to some scary, but good, places.
Here's a full seven days' worth of our most popular fast, fun, and intense workouts you can do at home. Just press play!
Tips to help you increase your training efficiency and power through your workouts from first the rep to the last.