That is true !
But for me working out made me so addictive. I feel so much compelled to go to gym 
despite getting tired next day i felt like i have to go again
may be there are some reason
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Work out make muscles prominent and it feels damn good
( btw, i am talking about manly work out like weight training and hardcore stuff… girly work out is so blah and so boring 
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I can throroughly enjoy eating yummy , like protien rich yummy stuff like minced meat eggs milkshakes and fruits, porridge with chicken and lots of more stuff