Answer:
There are many ways in which physical wellness can affect your self esteem. By striving for physical wellness, chances are your bound to gain muscle along the way, at least some. By doing this, your self image will be boosted, directly affecting your confidence which, in return, will raise your self esteem! In addition to this, physical wellness can also raise hormones in your body, making you feel empowered which will once again raise your self esteem. All of this can also be inversed; not striving for physical wellness can cause fat buildup, making your self image to be negative and lowering your self esteem. Not as many hormones can be created, thus more self esteem is lost.
(note: this is a short answer, im doing a test so couldn't go in depth. Hope this helps though! :)