I had a client who told me she was fasting in an effort to lose weight. Even after my explanation that fasting may create the opposite effect of her weight loss goal, she continued. During our training session, she complained she felt dizzy, so I stopped the session. Since she paid in advance for the next session, I told her we would continue if she would not fast the day of our session. I arrived and she told me she hadn’t eaten that day, so I refused to train her, refunded her money and asked her to seek medical advice for her extreme diet. There is more to this story, but I’m keeping it brief for a direct answer.