There is a new scientific study out in the New England Journal of Medicine. Researchers at the University of Toronto found a statisical correlation between shoulder flexability and the rate of hemmoragic stroke in women between the ages of 24 and 65. Apparently the same gene mutation that is responsible for a high degree of shoulder flex also has a protective effect on the plasticity of fine vessels in the brain. The relationship is poorly understood but the test id simple and free. Test subjects that could touch their elbows behind their backs had a very high correlation to having the protective TOF-4a gene.