okay at least with the hurdles I knew what they could be used for… but this…? Tug-o-war? Elastic resistant bungee band? Maybe I am too far removed from the business of athletic training.
I guess you could could consider it tug of war… Two people wear the loops around their waste, then run away from each other. It builds up your endurance, and stuff.
In my day when you wanted to train by running away from another guy you had to use braided vines or ropes if your folks were rich.