I do quite a bit of ab exercise, mainly the ones on the links up recently and have a wierd problem. No matter how much lower ab exercise I do, I cannot gain any definition for it. Reasons plz?

It takes about 6 weeks usually for normal results, make sure you are doing them correctly, if not, they won't help you.

Are you eating right and doing cardio?

Yeah .... kind of. Since I'm only 17, there is a lot of snacks (sugary) but not many healthy snacks. I do Eat about 4 apples a day plus healthy lunches and dinners.

 

Do crisps count towards this (bad food)?

To have good ab definition you need low body fat. If you are looking to reduce excess around the waist then you need to improve your diet and incorporate the cardio into your routine.

Unhealthy snacks could be slowing you down. Avoid the vending machines. And don't forget about the cardio.