I exercise about 2 hours a day every day. In the last 3 months I've lost 26 pounds, but my period is gone. What should I do? – Samantha* Many things can cause a girl to stop getting her period — including exercising a lot and losing weight quickly, especially if she's not consuming enough calories and healthy foods. Two hours of exercise a day can add up to a lot of calories burned. You should take in more calories now than when you weren't as active. Make an appointment with your health care provider. He or she can make sure nothing else is stopping your period, and work with you on a healthy eating and exercise plan. Your provider may ask you to increase your calories and decrease your workouts to get your body and your cycle back on track. *Names have been changed to protect user privacy. Back to Articles Related Articles Irregular Periods Wondering whether it's normal to have irregular periods? Get the facts about this common problem. Read More Compulsive Exercise Compulsive exercise can lead to serious health problems. Lots of people don't know when they've crossed the line from healthy activity to unhealthy addiction. Read about ways to tell. Read More Female Athlete Triad Female athlete triad is a combination of three conditions: disordered eating, amenorrhea (loss of a girl's period), and osteoporosis (a weakening of the bones). Read More PMS, Cramps, and Irregular Periods Get the facts on which period problems are normal and which ones might indicate something's going on. Read More A Guide to Eating for Sports You've prepared for the game in almost every way possible: but now what should you eat? Read about performance foods, nutritional supplements, and more. Read More My Periods Are Irregular. What's Going On? Find out what the experts have to say. Read More All About Periods Periods can be confusing. Get the facts in this article for teens. Read More Sports and Exercise Safety Playing hard doesn't have to mean getting hurt. The best way to ensure a long and injury-free athletic career is to play it safe from the start. Find out how. Read More Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.