“The majority of people who go to the gym, go two to three Times per week to train and waste your time with the Exercise of small muscle groups such as biceps Curls, triceps Extensions and Crunches”, says fitness trainer Jan Frederic Wobbe from the fitness Studio athletics Docks in Hamburg. “Much more useful in the short time it would be to perform Exercises in which large groups to be trained and the small muscle groups at the same time.” What are the are coach Kathi shepherd in the Video.