“I don’t have time to exercise” is one of the most common reasons people give for not working out. And it is often true. Between jobs, family, and everything else, finding a free hour for the gym can feel impossible.
Here is some encouraging news. A study published in Nature Medicine found that people who never formally exercised, but who did a few short, vigorous bursts of everyday activity each day, had a substantially lower risk of dying over the next seven years. Scientists call it VILPA, short for vigorous intermittent lifestyle physical activity. Most of us know it by a friendlier name: exercise snacks.
Key Takeaways
- Exercise snacks are brief bursts, often one to two minutes, of vigorous activity built into daily life.
- Examples include taking the stairs quickly, carrying heavy groceries, power-walking to a meeting, or playing energetically with kids.
- Among 25,241 adults who did no formal exercise, three bursts a day were linked to a 38 to 40% lower risk of dying from any cause and a 48 to 49% lower risk of dying from heart disease.
- The typical total was only about four to five minutes a day.
- Exercise snacks are a great starting point, not a reason to skip longer exercise if you can do it.
The Study Behind the Trend
An international team led by Professor Emmanuel Stamatakis at the University of Sydney analyzed data from the UK Biobank, a massive health study of British adults. More than 25,000 participants who reported doing no sports or leisure-time exercise wore wrist activity trackers for a week.
Using artificial intelligence trained to recognize movement patterns, the researchers identified every short burst of vigorous activity during ordinary daily life. They then followed participants for an average of almost seven years and compared death rates.
Three Short Bursts a Day vs. None
| Cause of death | Lower risk |
|---|---|
| Any cause | 38% to 40% |
| Cancer | 38% to 40% |
| Heart disease and stroke | 48% to 49% |
Source: Stamatakis et al., Nature Medicine, 2022.
The median participant did about three bursts a day, each lasting one to two minutes, adding up to just over four minutes. Benefits kept climbing with more bursts, with no obvious ceiling in the range studied. Remarkably, the researchers found similar results when they looked at more than 62,000 people who did exercise regularly, suggesting vigorous activity provides benefits regardless of how you get it.
As an observational study, it cannot prove the bursts directly caused the lower death rates. Healthier people may simply be more able to move vigorously. The researchers adjusted for many factors and excluded people who died early in the follow-up to reduce this bias, but randomized trials are still needed.
Why Would Tiny Bursts Matter?
Vigorous activity, the kind that gets you breathing hard within a minute, sends a strong signal to your heart, lungs, and muscles to adapt. Earlier lab research by Professor Martin Gibala at McMaster University, one of the study’s co-authors, showed that very short, intense efforts can improve cardiovascular fitness surprisingly quickly. Cardiorespiratory fitness is one of the strongest predictors of how long people live.
Short bursts also help muscles take up blood sugar and break up long stretches of sitting, which on their own are linked to poor health.
Easy Ways to Snack on Exercise
The goal is to move hard enough that you are breathing heavily and would find it difficult to hold a conversation, for about one minute. Ideas:
- Take the stairs briskly instead of the elevator, two or three flights at a time.
- Power-walk to the bus stop, the shops, or between meetings.
- Carry your groceries instead of using a cart for the last stretch.
- Play actively with kids, grandkids, or the dog for a minute or two.
- Do a speed clean: vacuum or mop at full speed.
- Squat or step-up during TV commercial breaks.
- Garden with gusto: digging and raking can quickly become vigorous.
- Cycle hard for a minute on your commute.
Try to spread three or more snacks across your day: perhaps one in the morning, one at lunch, and one in the evening.
Snacks or a Full Meal?
Exercise snacks are a fantastic entry point, especially for busy or sedentary people and older adults who find structured workouts intimidating. But they work best as part of a bigger picture. Standard guidelines still recommend at least 150 minutes of moderate activity or 75 minutes of vigorous activity a week, plus strength training twice a week. If you can, build up from snacks toward full “meals.” Structured walking programs like Japanese interval walking are a great next step.
Safety Tips
- If you have been inactive for a long time, have heart disease, or have joint problems, check with your doctor before adding vigorous activity.
- Build intensity gradually. Start with brisk rather than all-out effort.
- Stop if you feel chest pain, severe breathlessness, or dizziness.
The Bottom Line
You may not need a gym membership or an hour of free time to protect your health. A few one-minute bursts of vigorous activity built into everyday life, adding up to just four or five minutes a day, were linked with a dramatically lower risk of early death in a large study of non-exercisers. Next time you see the stairs, take them, and take them fast.
Frequently Asked Questions
How do I know if I’m working hard enough?
You should feel your heart pounding and be breathing hard enough that talking is difficult within about a minute.
Do exercise snacks build muscle?
Some, like stair climbing and squats, challenge leg muscles. For full-body strength, add dedicated strength training.
Are exercise snacks safe for older adults?
Generally yes, and they may be especially valuable. Start gently and check with your doctor if you have health conditions.
Can I count my brisk dog walk?
If parts of it get you breathing hard, such as walking quickly uphill, yes.
Sources
- Stamatakis E, Ahmadi MN, Gill JMR, et al. Association of wearable device-measured vigorous intermittent lifestyle physical activity with mortality. Nature Medicine, 2022.
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans.
This article is for educational purposes and is not medical advice. Check with your doctor before starting vigorous exercise if you have health concerns.
