Tetanic contraction

Tetanic contraction is like when you squeeze your hand really tight and keep it squeezed for a long time. When your muscles contract, that means they get shorter and tighter. Your muscles do this so you can move your body around. Just like when you squeeze your hand, your muscles can also contract really fast and then stop. But when they contract really fast a lot of times in a row without stopping, that's called a tetanic contraction. It's like when you jump up and down really fast and don't stop. Your muscles can do this too and it's called a tetanic contraction.