What is the energy released during respiration used for?

Using your muscles, Growth and repair cells, building smaller molecules from smaller ones, i. e

The energy released is stored in form of ATP which is then later used for different purposes such as

- movement - eg muscle contraction

- active transport of substances in/out of the cell thru the cell membrane

- synthesis of complex organic molecules (eg proteins) from simpler ones known as anabolism.

And many many other roles.