Why does exercise make us happy?

<!----- 'Copy and paste the following code' ----><h3>Why does exercise make us happy? And the science behind it...</h3><a href="https://www.leisurejobs.com/article/why-does-exercise-make-us-happy/"><img src="https://www.leisurejobs.com/getasset/207628e4-cf8e-4ad8-a31f-acb4d9d3a80a/" alt="Leisurejobs.com" /></a><br><p><a href="https://www.leisurejobs.com">Leisurejobs.com</a></p>