This workout is intense and convenient because it can be done anywhere. You are using your upper body to hold up your frame during the exercises, your legs are always constantly working so it serves as a great lower body routine. Of course your core is being activated due to holding yourself up for over 1 minute per set, not to mention the hurt your going to put on your abs with the movements in this workout. Another fantastic feature this routine provides besides being less than half an hour long, is that due to the high intensity interval work your body is going to be melting fat off of itself! Give it a try and after you catch your breath, share it with a friend!