A HIIT style ab workout that will have your abs crushed in no time! But fear not we ain’t just doing crunches, in fact there isn’t a single ab crunch in this workout! But don’t let that fool into a false sense of security. This half hour workout is fast paced and will have your happy hormones pumping like no ones business. To see just how beneficial it is for your mental health, write down how you feel before your workout and then again immediately after.