What is contraction?

Contraction is when something gets shorter or tighter, just like when you pull a rope to make it shorter.

Imagine you have a rubber band around a group of pencils. When the rubber band is loose, it’s easy to stretch, that's like not being contracted. But if you push the pencils together, the rubber band gets tighter and shorter, that's contraction in action!

Think of a slinky. If you let it hang down, it's long and loose. But when you hold both ends and pull them up, the slinky gets shorter, just like when something contracts.

Your body does contraction too! When you breathe in, your lungs get bigger, but when you breathe out, they get smaller, that's a kind of contraction happening inside your chest!

So, whether it’s a rubber band, a slinky, or your lungs, contraction is just something getting shorter or tighter, and it happens all around us every day!