I have been trying out different equipment to use for cross-training and I believe that this elastic exerciser made by Pinjian is a great complement to my Pilates machine. Cross-training has to be one of my weaknesses. I usually just run six days a week and then have an off day, but I feel that cross-training will make me a stronger runner. I came across this elastic exerciser and it is very simple and effective. You just put your feet in the stirrups and pull the handle. My arms are very weak, so I could feel them working hard right away. I do wish that there was more of a resistance for when I get stronger, but it does the job at the moment. It is very light-weight, compact enough to take along during trips. To read more about this piece of equipment you can find it here on Amazon.