Exercising at the right time of day that suits your body could be key to slashing heart attack risk, research suggests. Researchers have looked at the importance of the so-called circadian rhythm and whether someone is an “early bird” or a “night owl”. A trial showed exercising at the right time of day for your body boosted a host of heart health measures, particularly improving blood pressure and sleep quality. Experts say the findings, published in the journal Open Heart, suggests the NHS