Granite male enhancement plank skull crusher so a plank position hands lined up with the head we're gonna push off the ground and slowly control it down hitting the triceps in the core same time so we're building the core and the triceps push-up same time come down nice and control keeping that core brace okay so playing tricep extension number two number three again one of my favorites for building muscle that explosive muscle fiber in the chest plyo push-ups so we're coming down pushing up popping off the ground pop it onto the ground you can go from your knees that's fine if you get fatigued that's fine the key is elbow still back shoulder blades