Phil Heath have squeezed his workouts in a hotel room when he had no other option. When Phil Heath was in high school, he used to get into wall sit competitions with a friend of his. They’d be watching TV and do wall sits through the commercial breaks.

Phil Heath: “It’s brutal. In fact, it’s hard to think of a tougher leg workout than to superset squats with wall sits.”

Phil Heath 15 Minute Quads Workout Routine

supersetted with.. did you guess it?