Is there a Dr in the house? Am I reading this correctly as if you improve your sleep you could possibly (I don't know the correct word to use here) improve? reduce? the plaque buildup in your arteries?
It will reduce your risk. Poor sleep leads to an inflammatory cascade which can contribute to atherosclerosis. Also affects blood pressure; hypertension is a well-established risk factor for vascular disease. More reading here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3548567
