Here’s a simple thing to keep in mind..
If the weather is decent, walk to class. Don’t take the bus because you’re too tired.
Don’t take the elevator/escalator. Take the stairs.
All these movements will work your body.
It’s not a full-blown exercise, but these simple steps add up.
Find little ways to move throughout your day. The more you sit around the less you work off the food you eat.
The less it seems like exercise, the more likely you’ll do it.
Keep this in mind the next time someone asks you to walk somewhere with them.