Q. What does the pec deck machine work?

Using a pec deck machine to work out the chest is a simple and effective way to develop the primary pectoral muscles. According to the fitness level a user can modify the weight. This workout is great for building up the pecs but it also helps strengthen the shoulders and abdominals. According to a 2012 study funded by the American Council on Exercise the pec deck is almost as effective as the bench press at stimulating the pectoralis major muscle. It is not a complete chest workout without the addition of the pec deck fly to the bench press and bent-over cable crossover flyes.