Lie on your back with the leg you want to exercise straight. The other knee should be bent to support your lower back. Tighten the muscle on the top of your thigh and lift to the level of your other knee. Slowly lower.
While it was originally believed that most vascular malformations are present at birth (congential), cavernous malformation lesions may develop throughout the lifetime of the affected individual. Other vascular malformations are not congenital, but are caused by trauma, radiation, or other injury to the spinal cord.
Cavernous angiomas belong to a group of intracranial vascular malformations that are developmental malformations of the vascular bed. These congenital, abnormal vascular connections frequently enlarge over time. The lesions can occur on a familial basis.