Skinny but with pot belly although have tried my best, how to rid it?

i%26#039;m 27 male.because i%26#039;m so injured, i can%26#039;t do harcore exercise workouts: knee ligament torn since years ago and i have arthritis. chest ligament torn long tme ago and it hurts bad. So i only do say 30 minutes a day , can%26#039;t do running but i do shadow boxing a nd light jumping and slow pushups. and lift my backpack and i do crunches. i do get a nice sweat and i do exercise most everyday/





My usual meals are:





7am cereal breakfast


10am banana or granola


12 or 1 lunch. which is sandwich, fruit, drink, little treat


3pm maybe alittle snack


5 or 7 dinner which can be anything from healthy salads, beans %26amp; rice, veggies, quesadillas etc





10pm small bowl of cereal cause i get really hungry.





I don%26#039;t eat fast food like mcdonalds, etc. only sometimes on weekends. I was injured for a long time then i restarted exercise since about 1 year now but since i%26#039;m limited i feel i can%26#039;t lose becaues of it. so what to do?|||HEY DUDE....im about to turn 36....and i dont know when it happened, but my butt cheeks flattened out, my arms look like sticks, but my pot belly looks like i am 2 years pregnant.





I eat like a pig, but it seems like all the fat in my body went to my belly, i think its part of growing old.





My butt cheeks used to hold my pants up, but now i need a belt.





I eat junk food constantly, and i know it would go away if i ate better and exercised.|||do lots of abdominal crunches. they work, but you have to keep at it.