”Sweden’s latest fitness craze — plogging — is making its way to U.S. shores. The term is a mash-up of jogging and the Swedish “plocka upp,” meaning pick up. In this case, litter.”
Erik Ahlström is the Swede who got tired of seeing garbage in Stockholm and decided to do something about it. He started jogging groups and combined it with picking up all the garbage they found. It's good for the environment and it adds to the training.
The unusual training form has spread to many other places around the world.