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Think you need to overhaul your entire lifestyle to boost your heart health? Think again. A large new study found that adding just 11 minutes of sleep each night, along with slight improvements in diet and exercise, was linked to a 10% lower risk of heart attacks, strokes, and heart failure.
The study, published in the European Journal of Preventive Cardiology, is the first to investigate the minimum combined improvements in sleep, physical activity, and nutrition needed for a meaningful reduction in cardiovascular risk.
Big benefits from tiny changes
Researchers analyzed data from 53,242 adults from the UK Biobank over an eight-year period. Sleep and physical activity were tracked with wearable devices, and diet was assessed using a questionnaire that produced a diet quality score.
The results were clear. People who slept just 11 extra minutes per night, got about 4.5 more minutes of moderate exercise each day, and ate roughly a quarter-cup more vegetables daily had 10% fewer major cardiovascular events over the study period.
The recipe for even bigger benefits
The study also identified an optimal combination of habits: sleeping 8 to 9 hours per night, doing more than 42 minutes of moderate-to-vigorous physical activity a day, and eating a higher-quality diet. People with this combination had a 57% lower risk of major heart problems compared to those with the least healthy lifestyles.
Even people at a mid-range level for all three behaviors saw a 41% lower risk of major cardiovascular events.
Why does sleep matter so much?
Along with nutrition and exercise, sleep is one of the three pillars of a healthy lifestyle. The American Academy of Sleep Medicine recommends that adults get 7 or more hours of sleep per night for optimal health.
This study’s findings suggest the sweet spot for heart health may be even higher — around 8 to 9.4 hours per night.
In a press release, Dr. Nicholas Koemel, lead author and research fellow at the University of Sydney, put it this way: “We show that combining small changes in a few areas of our lives can have a surprisingly large positive impact on our cardiovascular health.” Making a few small, combined changes is “likely more achievable and sustainable for most people when compared with attempting major changes in a single behavior.”
These habits are more connected than you think
Poor sleep disrupts the normal transmission of appetite hormones, which can make you eat more and choose less healthy foods. Feeling exhausted from poor sleep can also sap your motivation to be physically active.
On the flip side, regular physical activity may improve sleep quality, and a nutritious diet supports both better sleep and the energy needed for exercise. Since these behaviors influence each other, improving all three can lead to a bigger payoff for your heart.
A few caveats
This was an observational study, so it cannot prove that these lifestyle changes directly caused the lower risk. The researchers note that intervention trials are needed to fully confirm the findings. The data came from a UK Biobank sub-study of 502,629 adults aged 40 to 69 who were recruited between 2006 and 2010.
The bottom line?
You don’t need a dramatic life overhaul to protect your heart.
“Making even modest shifts in our daily routines is likely to have cardiovascular benefits as well as create opportunities for further changes in the long run,” Dr. Koemel said in the press release for this study.
Small changes — like going to bed a few minutes earlier, taking a short walk during the day, or adding an extra serving of veggies to your meals — really do add up. So tonight, try turning in a bit sooner. Your heart might thank you for those 11 extra minutes of sleep.
Medical review by Helena Schotland, MD
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