Nice work! Let's give those legs and booty a bit of a rest after all the hard work they did yesterday and shift our focus to our upper body, as well as core. We'll be doing rotation push ups, dips, back extensions, crawl outs, plank-shoulder taps, swimmers, and crawl outs for a thorough arm, back, and core shred that you'll definitely be feeling by the end of it. Plank form is absolutely essential to so much of what we do, so take today to really focus on finding and maintaining neutral spine. You can also use a mirror to make sure you're on form.