Welcome, imaginary internet friends.
Yes, singing while working out is highly effective. Okay, I really have no idea but it makes working out more fun!
It's the only way I can tolerate exercising, if I have something to distract me! Sing away, sing loud for all to hear, it'll increase your heart rate and a talent scout is bound to hear you and will make you a star!
I like the way you girls think.
Perhaps it's working that diaphragm? Kidding, no the only thing being excerised is patience toward the singer.