Claims this article which suggests treats after a workout mean 25% of people actually gain weight. According to the article going to the gym makes people feel complacent meaning they find it harder to stick to their recommended daily calorie intake. Exercising also increases the appetite meaning people are more likely to overindulge. I think these are fair points but surely doing no exercise will make you fatter. It’s got to be better to exercise and have the odd treat than do nothing at all.