My doctor said because I’ve gained so much muscle in sports and the gym, that it delayed my period

Okay, so it's true that intense exercise and big changes in your body, like gaining a lot of muscle really fast, can sometimes mess with your period and make it come later. Your body is just trying to figure things out, and sometimes it decides it needs to put all its energy into building muscle instead of starting your period.

Why exercise can affect your period

When you're super active, especially in sports or the gym, your body uses a lot of energy. Your hormones that control your period are super sensitive to energy levels and nutrition. So, if your body thinks it's working overtime, it might delay your period because it's like, "Whoa, let's just focus on these muscles for now!"

It's not usually a big deal, especially if you're eating enough and feeling good. But sometimes, if you're really pushing yourself super hard and not fueling your body enough, it can also lead to something called "athletic amenorrhea," which just means your period stops for a bit. That's why it's always good to make sure you're eating enough yummy food to keep up with all that awesome muscle-building you're doing. Being strong is amazing, and you want your body to have everything it needs!

If you're ever worried or your period stays delayed for a really long time, it's always a good idea to chat with your doctor again, just to make sure everything is good to go.