How even super-short workouts can improve your health

2022-12-27 22:07:32
How even super-short workouts can improve your health

Adults should get at least 75 minutes of vigorous physical activity, or 150 minutes of less-intense activity, each week. But over the past few years, a slew of studies have promoted the benefits of getting much, much less exercise than that.

One 2022 study found that squeezing in just three one-minute bursts of vigorous activity each day could lead to a longer life. Another study, also published in 2022, linked 15 minutes of weekly physical activity to extended longevity.

A 2019 paper went even further, arguing that just 10 minutes of weekly movement could help you live longer. These results are tantalizing—but also may seem a little too good to be true, given long-standing activity guidelines that recommend getting roughly 10 times as much exercise to stay healthy.

“There are probably people out there who are looking at this and saying, ‘Well, I’m not sure I buy that,’” says Stephen J. Carter, an assistant professor of kinesiology at the Indiana University Bloomington School of Public Health who researches exercise and aging. “But maybe we ought to be thinking about exercise differently.”

Any amount of movement is better than none, Carter says, and it takes surprisingly little to benefit your health.

How short bursts of activity benefit your health

When you put stress on your body through exercise, even for a short time, you trigger physiological changes, says Malia Blue, an assistant professor of exercise and sport science at the University of North Carolina at Chapel Hill. Even small doses of activity can increase blood flow and improve the body’s ability to regulate blood-sugar levels. Over time, these changes could reduce your risks for conditions such as diabetes, heart disease, and stroke, Blue says.

When your muscles are active, they also release compounds that can improve the health of organs throughout your body, says Kevin Murach, an assistant professor at the University of Arkansas who researches muscle biology.

Plus, by getting up and moving—even for just a minute—you’re interrupting sedentary time, Blue says. Research has shown that sitting too much is bad for your health, and that replacing virtually any amount of sedentary time with movement is beneficial. “There’s a kind of a twofold [benefit]: if you break up your sedentary time and you increase your physical activity, you’re going to see health benefits from both,” Blue says.

People who exercise in hopes of losing weight or training for a specific athletic event probably won’t get dramatic results with a few minutes per day. But that doesn’t mean you aren’t benefiting from those short spurts of movement.

Studies back that up: One widely cited research review from 2014 demonstrated that cardiorespiratory fitness is a better predictor of mortality than body mass index. That finding shows exercise can benefit your health at any size. The benefits also extend beyond your physical body, as many studies have shown that movement benefits mental well-being.

The benefits can be hard to quantify

Murach agrees that even a little exercise can improve your health, but he says it’s important to be cautious when interpreting studies on bite-sized workouts. Often, studies capture only a snapshot of time rather than participants’ entire lives, Murach says. Some studies also don’t do a great job of teasing out whether exercise caused certain health benefits or is simply correlated with them.

“I’m sure there is a benefit,” Murach says. “But if you’re doing a minute of exercise a day, is that going to be the silver bullet for extending your lifespan?” That’s harder to know for certain, he says.

Another complicating factor is that people start from different baselines. For someone who is entirely sedentary, adding even a short amount of exercise per week might be a fairly dramatic change. But for someone who is already exercising sporadically, it will likely take more than a few extra minutes to achieve additional health boosts.

Source: Time


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