According to new research it turns out music truly does make us feel powerful but not all songs make us feel like this. It's all to do with the bass of the songs which triggers something in your brain to make you feel better. We all have our favourtie gym tracks that we like to listen to which will pump us up, are these tracks full of bass? If they are now you know why you feel so good listening to them!
Reference - Daily Mail - http://www.dailymail.co.uk/sciencetech/article-2718080/Pump-volume-ego-Music-makes-feel-powerful-especially-bass-strong.html