If you want to feel your shoulders burning your core working and your legs shaking and end your session dripping in sweat and fully relaxed, try this 70 minute yoga video. I’ve only been able to make it through the entire thing in one go twice. Yesterday was the second time. And it was awesome. Plus, all you need is a yoga mat (or not, but your palms will get sore if you do it on hardwood or tile :P).