Overexertion means pushing your body beyond its limits, working so hard physically that you strain or exhaust yourself. The “over” part tells you it's too much: more effort than your body can safely handle.

When you overexert yourself, you might feel dizzy, extremely tired, or even get injured. A runner who sprints full speed for too long without building up endurance risks overexertion. A student who tries to move heavy furniture alone instead of asking for help might pull a muscle from overexertion. Even something simple like shoveling snow for hours without breaks can lead to overexertion if you're not used to that kind of work.

Your body usually sends warning signals: your heart pounds, you can't catch your breath, your muscles burn or shake. Smart athletes and workers pay attention to these signals. They take breaks, drink water, and gradually build up their strength and stamina over time.

Think of it like revving a car engine too high for too long. Overexertion happens when you push past what you're ready for, and unlike a video game character, your real body needs time to rest and recover. Knowing your limits isn't weakness; it's wisdom that helps keep you healthy enough to keep working hard tomorrow.