One of the ways that HiiT Low Impact One is unique is how Cathe uses a yoga mat as a visual and as a tool for cardio in this workout. You can think of the yoga mat as a big step without any height for this routine. You will do low impact cardio moves around the mat, over the mat and even on the mat. Using the mat as a visual in this way makes you reach further and push harder than you otherwise would if you didn't have a visual.