He or she may tell you to hold off on weightlifting for a bit or give you some advice on how to start.
If your doctor discourages weightlifting, try some other ways to work out.
But by being active and eating nutritious foods, you're helping your body grow up healthy, just the way it should.
During puberty, some boys might become worried about their bodies after seeing what some of their friends look like.
You're growing hair in new places because hormones are telling your body that it is ready to change.
Some of the hormones that trigger this new hair growth come from your adrenal glands.
These feelings can confuse you and may leave you scared.
This is natural because you are going through a new phase in your life.
There aren't any exercises or magic pills to make you grow tall.
Others may have broad shoulders (the deltoids, or delts for short). Remember that puberty happens on its own schedule, so there's no rushing it if you're a little slower to develop muscles.
Maybe you've considered lifting weights to help yourself get bigger.
In time, you'll reach puberty and you can start building your muscles, too.
If you decide to try lifting weights, first let your doctor know you are interested.
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Other hormones come from your pituitary (say: puh-TOO-uh-ter-ee) gland (a pea-shaped gland located at the bottom of your brain).