There is a very famous quote of Holy Quran

Surely Allah does not change the conditions in which a people are in until they change that which is in themselves… (13:11).

Life is a continuous journey of observing new things. I am agreed upon this factor you mentioned

Exercises make you feel better about yourself, thus boosting your confidence. It also helps to get rid of anxiety, reduce stress while releasing euphoric chemicals or neurotransmitters like dopamine and endorphins in your brain

One more great piece writing <3

Stay Blessed, @jwolf