Do you lose more weight exercising while on your period?

The hormone progesterone causes you to hold on to water weight until about a week before your period, then releases it if you are not pregnant. It's your body's way of making sure your body can maintain a pregnancy if it occurs. After that, the bloating can make you look as though you've gained weight until your cycle starts over. It's only temporary, though. You will go back to your normal size after your period ends. If you have been gaining weight from your period, you should be careful about your eating habits. The fatigue often causes your appetite to increase and also may cause cravings, especially for junk foods like chocolate.