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Avoid listening to music you don’t like! Researchers from the University of Maryland found people forced to listen to songs they disliked saw their blood vessels constrict about 6% within 30 minutes, which reduced blood flow, strained their heart, and raised the risk for clogged arteries. While people listening to their favorite songs saw their blood vessels expand by 26%, making them wider and more relaxed. And their bodies were pumping out nitric oxide, a compound that helps prevent the clots that can trigger a heart attack.