While that may be, it is not involved enough to make pullovers considered a chest movement. Every other chest exercise involves bringing the arms away from and back to (horizontal abduction and adduction) the body. There is a reason for that. Using pullovers as a chest exercise is similar to saying triceps pressdowns should be included in a forearm routine under the logic that your extensors and flexors are secondarily involved in stabilizing the bar. Lol! -EK