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Fitness without the sweat: the power of 'exercise snacks'
For those who lack time or motivation for lengthy workouts, brief bursts of movement-dubbed "activity snacks"-may offer significant health benefits, according to new research from University College London.
What are 'exercise snacks'?
Jo Blodgett, a senior research fellow at the Institute of Sport, Exercise and Health, describes these as short, intense moments of effort woven into daily routines. Officially termed "vigorous intermittent lifestyle physical activity" (VILPA), they involve briefly elevating your heart rate during ordinary tasks.
"It's about identifying opportunities in your day that push you slightly harder," Blodgett told the What's Up Docs? podcast on Radio 4. Examples include speed-walking to the bus stop, taking stairs two at a time, or carrying groceries with extra vigor.
How little movement makes a difference
Even minimal effort can yield results. Blodgett's research suggests that just three or four one-to-two-minute bursts of intense activity daily can reduce the risk of heart disease and improve life expectancy-especially for those who currently move very little.
However, she cautions that regular gym-goers shouldn't feel complacent. Many fall into the category of "active couch potatoes," where a single workout fails to offset prolonged sitting.
"Thirty minutes in the gym is only a tiny part of it. What about the other 23-and-a-half hours?"
Jo Blodgett, UCL
Breaking up sedentary time
Blodgett advises standing, stretching, or moving every 15 to 30 minutes to counteract the harms of prolonged sitting. This approach aligns with guidelines from countries like Canada and Australia, which recommend that at least half of waking hours-roughly eight hours for those who sleep eight hours-should involve movement.
"There's no one-size-fits-all rule," she notes. "The more you move, the better."
Prioritizing movement over stillness
While high-intensity exercise remains the gold standard for fitness, Blodgett suggests shifting focus from "how much exercise" to "how little time spent inactive." This mindset reframes health goals around reducing sedentary behavior rather than solely chasing workout targets.
For those overwhelmed by traditional fitness advice, these micro-moments of activity offer a practical, low-barrier alternative.
