Put into practice what you teach
One of the most difficult exercises is a pull-up. While working on her pull-ups at the gym, this man came and observed how she was doing. She asked him to show her how to do pull-ups properly after he informed her she wasn’t doing them right.
He grasped the bar with both hands and failed to do a single pull-up in a humiliating performance! We suspect he lied when he stated he “used to do them all the time.” Ouch.