Exercise snacks: 1-minute bursts and your fitness

"Exercise snacks" are having a moment. The idea is simple: instead of finding an hour for the gym, you sprinkle short bursts of hard effort through the day. The topic is trending because wearable studies of everyday movement made headlines by linking just a few minutes of vigorous daily activity to longer life, and because time-poor adults want something that fits around work. Here is what the research does and does not show.

What counts as an exercise snack

Researchers use two related terms:

• Exercise snacks: deliberate bursts of vigorous effort, typically one minute or less up to a few minutes, repeated across the day. Islam, Gibala and Little (2022) reviewed the concept as a practical way to improve cardiometabolic health.
• VILPA (vigorous intermittent lifestyle physical activity): brief vigorous bouts that are part of daily life, such as climbing stairs quickly, carrying heavy bags or walking fast uphill.

The common thread is intensity. A snack should leave you breathing hard enough that talking in full sentences is difficult, if only for a minute.

The UK Biobank findings

The headline study is Stamatakis et al., 2022 in Nature Medicine. Researchers analysed wrist accelerometer data from 25,241 UK Biobank adults who reported doing no leisure-time exercise, and followed them for around seven years. Most VILPA came in bouts of one to two minutes.

Compared with people who had no VILPA, those doing about three short bouts a day (the group median) had a lower risk of death from all causes, from cancer and especially from cardiovascular disease. The relationship looked roughly dose-dependent: more bouts, lower risk.

A follow-up analysis of the same cohort by Stamatakis et al., 2025 looked at major cardiovascular events such as heart attack and heart failure. The associations were strong in women, with only a few minutes of VILPA a day, while in men the pattern was less clear.

Important caveat: these are observational studies. People who move briskly every day may be healthier in ways the researchers could not fully measure, and some ill people may be unable to do vigorous activity at all. The results are encouraging, not proof that snacks cause longer life. They fit, though, with the strong link between fitness and survival covered in VO2max and longevity.

Do snacks actually improve fitness?

Here randomised trials help. In Jenkins et al., 2019, inactive young adults vigorously climbed a three-flight stairwell (60 steps) three times a day, with one to four hours between bouts, three days a week for six weeks. Compared with a control group, they improved peak oxygen uptake, a direct measure of cardiorespiratory fitness, and their peak cycling power.

The gains were modest but real. Snacks timed before meals may also help blood sugar: Francois and colleagues (2014) found that brief intense bouts before meals improved glucose control in people with insulin resistance (see VO2max, diabetes and insulin sensitivity).

Study	Design	Who	Main finding
Stamatakis et al., 2022	Observational, ~7-year follow-up	25,241 UK adults who did no exercise	~3 bouts a day of VILPA associated with lower all-cause, cancer and CVD mortality
Stamatakis et al., 2025	Observational, same cohort	Non-exercising UK adults	VILPA associated with fewer major cardiovascular events, clearest in women
Jenkins et al., 2019	Randomised trial, 6 weeks	Inactive young adults	Stair-climbing snacks improved cardiorespiratory fitness
Francois et al., 2014	Randomised crossover	Adults with insulin resistance	Pre-meal intense bursts improved glucose control

A practical menu of snacks

Aim for about a minute of genuinely hard effort, several times a day.

• Stairs: take two or three flights briskly instead of the lift, or do one fast climb after each coffee.
• Uphill power walk: walk as fast as you can up a hill or ramp for 60 seconds.
• Bike or e-scooter swap: pedal hard for a minute on the commute, or between traffic lights.
• Carry the load: carry shopping bags or a child up stairs instead of using a trolley or lift.
• Bodyweight burst: 20 to 30 seconds of squats, step-ups or jumping jacks, repeat once.
• Play: a minute of all-out chasing with kids or the dog counts.

Where snacks fit in a training plan

For inactive people, snacks are an excellent entry point. For regular exercisers, they are a top-up, not a replacement. The biggest improvements in VO2max still come from structured work such as the Norwegian 4×4 or a mix described in HIIT vs steady cardio. A sensible path is to start with snacks, then add one or two longer sessions a week as described in how to improve your VO2max.

Curious where you stand? Estimate your fitness with the VO2max calculator or see your fitness age, then check again after a couple of months. More studies are summarised on the research page.

Safety: vigorous bursts are safe for most people, but if you have heart disease, chest pain, dizziness on exertion, uncontrolled blood pressure or have been inactive for a long time with risk factors, speak to a doctor first and build up from brisk rather than all-out efforts. Stop if you feel chest pain, faintness or unusual breathlessness.

Sources

• Stamatakis E, et al. Association of wearable device-measured vigorous intermittent lifestyle physical activity with mortality. Nat Med, 2022.
• Stamatakis E, et al. Device-measured vigorous intermittent lifestyle physical activity (VILPA) and major adverse cardiovascular events: evidence of sex differences. Br J Sports Med, 2025.
• Jenkins EM, et al. Do stair climbing exercise "snacks" improve cardiorespiratory fitness? Appl Physiol Nutr Metab, 2019.
• Islam H, Gibala MJ, Little JP. Exercise snacks: a novel strategy to improve cardiometabolic health. Exerc Sport Sci Rev, 2022.
• Francois ME, et al. 'Exercise snacks' before meals: a novel strategy to improve glycaemic control in individuals with insulin resistance. Diabetologia, 2014.