I liked your work with Startup Foundry so I was excited to see this, and I'm sure you're using many tried-and-true entrepreneurial principles to get this off the ground. But the psychological UX needs to focus on the positives and the benefits people will experience. That does not mean you have to achieve that by ostracizing people who enjoy working out, or by convincing people who don't work out that if you do work out you'll become a meat head.