Well bodybuilding is nothing just a mere confusion of your heart and mind. You want to build your muscles but your heart is not allowing you to have regular fitness routine.
Many people are of the view that doing fitness work in the start or going to gym for sometime can make them smart but later when they leave such routines, they become bulky. Well thats not the truth, when you are trying to make you shape you have many options in your mind. You can not only trust gym, but also your personal fitness tips as well. I have experienced many ups and downs during my weight lifting career, later on i left bodybuilding because i have a very tight schedule but i still found a way to have my shape maintained perfectly and that is situps and chin ups.
You just have to do chin ups and sit ups on daily basis to keep yourself fit for every day. Situps not only worked for your body but also help you to get rid of knock knee.