AI Tutor
Have you ever noticed that after running around at recess, you sometimes have more energy than when you were just sitting on the couch?
It sounds like a trick, but moving your body actually creates energy instead of using it all up.

How Fitness Gives You Energy

When you are fit, your heart and lungs get stronger at delivering oxygen—the fresh air your body uses as fuel—to every muscle.
A stronger heart pumps more oxygen-rich blood with each beat, so normal things like climbing stairs or carrying a backpack feel super easy.
Having all that extra fuel is great for playtime, but what happens inside your body when bad germs try to make you sick?

Fighting Off Illness

Your body has a built-in defense squad called the immune system, which uses tiny cells in your blood to hunt down germs and viruses.
When you exercise regularly, your blood flows faster, sending those defender cells on patrol through your body much quicker to stop sickness before it starts.
Staying healthy and energized is huge, but did you know that fitness also changes how your brain feels?

Why Movement Boosts Your Mood