Contraceptive pills may reduce or prevent muscle growth.
From an article on being fat and fit:
As long as people see physical activity primarily as a way of losing weight, they are unlikely to keep it up, either because it doesn’t achieve that objective quickly or because they think they have to lose weight before they can take up serious exercise […] the benefits of being fit are usually greater than those of weight loss.
Finally, as Kate Harding twittered, Trolls Aren’t New. But before email they had to, you know, find paper and stamps. :)