CF Kids Big Dawgs hanging out. Seated Box Jump 3RM Perform a 3RM box jump that begins from a seated position. Take 4-6 attempts. Don’t forget, we’re squatting after this. ___ Back Squat 3-3-3-3-3 Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to email a link to a friend (Opens in new window)