they were doing, they were working with the math class to find out the cost of their homes and to see if their predicted jobs after school would be able to sustain them and their newly designed residence. check out the video above to learn more about the process! lower risk of injury and actually target the 20+ muscles that make up your core. these include planks, bicycle kicks, and alternating heel touches. include them in your strength training workout to achieve true core strength, which gives you more than just a pretty washboard effect. 