Intermittent fasting (IF) may be the secret to revving up your exercise mojo, according to a study published in the Journal of Endocrinology.

The study, admittedly carried out on mice, found that access to food increased levels of the hunger hormone ghrelin, and it is though that hunger may also be involved with exercise motivation.

The researchers gave two groups of mice a similar amount of food, giving one group free access to food, while the other was fed twice per day for a limited time.

When wheel-running activity of the mice was compared, the mice in the restricted food group had run significantly more than the other group.