I have really liked doing pushups from the top of chairs. I place one chair at my feet and two chairs , one for each hand, in a shoulder width position by my head. This is as if i am doing regular pushups. I have noticed that i get a much better pump from doing this exercise than doing free weights. Should i alternate these two types of workouts. For example do the "hanging pushups" one week and do the free weight chest routine the next.