Can i exercise if i have aneurysms? or will it harm me?

Moderation: Yes you can excercise but nothing extreme. Any excercise that can make your blood pressure very high can induce rupture . Also this depends on location and size of the aneurysm , for example if you have a 3.5 cm abdominal aortic aneurysm then you are safe but if it is 8 cm then get it fixed soon first.

Yes: You need to be careful not to raise your blood pressure and a lot depends on where your aneurysm is. Would talk to your vascular surgeon before proceeding.

It depends: It really depends on the type and size of aneurysm.

Highly variable: Depends on size & location of aneurysm...Assuming we are talking about aortic aneurysm. Ct or MRI scans are useful for determining the above.