You’re busy. Some weeks the 45-minute gym session just isn’t happening, and you feel your fitness sliding. Here’s the good news: a 2025 review of 11 trials found that short bursts of exercise, five minutes or less, done at least twice a day, measurably lifted heart and lung fitness in inactive adults.
Below: what exercise snacks are, what the research actually shows (fitness, blood sugar, longevity), 10 ready-made five-minute snacks, and how to fit them into a working day.
- What they are: short bouts of hard-ish exercise, usually five minutes or less, spread through the day.
- The big review: 11 randomised trials, 414 inactive adults, at least two snacks a day for 4 to 12 weeks (British Journal of Sports Medicine, 2025).
- What improved: cardiorespiratory (heart and lung) fitness in adults; muscular endurance in older adults.
- What didn’t: leg strength, body fat, blood pressure and blood fats showed no clear change.
- Sticking with it: about 83% of people kept to the plan.
- Blood sugar: in a small trial, six one-minute hard walking bursts before each meal lowered 24-hour glucose more than one 30-minute walk.
- Easiest snack: run up three flights of stairs, three times a day.
What are exercise snacks?
An exercise snack is a short, deliberate burst of effort that gets your heart rate and breathing up, done a few times across the day instead of in one long session. Think a hard run up the office stairs, a set of kettlebell swings in the garage, or a minute of burpees before lunch.
The researchers behind the 2025 review used a tight definition: bouts of five minutes or less, done at least twice a day, at least three days a week, for at least two weeks. Intensity ran from moderate-to-vigorous up to near-maximal effort.
That’s the difference between a snack and just “moving more”. A stroll to the printer doesn’t count. You want to finish a snack a bit puffed.
The evidence: what exercise snacks actually do
Heart and lung fitness (VO2)
The headline study is a systematic review and meta-analysis led by Miguel Ángel Rodríguez, published online in the British Journal of Sports Medicine in October 2025. It pooled 11 randomised controlled trials with 414 physically inactive people, comparing exercise snacks against groups that didn’t exercise.
Programs ran for 4 to 12 weeks, three to seven days a week. Younger and middle-aged adults mostly did stair climbing; older adults mostly did leg-focused strength moves and tai chi, according to the BMJ’s summary.
The result: exercise snacks significantly improved cardiorespiratory fitness in adults, the measure that VO2 max tests capture. The authors rated the certainty of that evidence as moderate. Older adults also gained muscular endurance, though that evidence was rated very low certainty.
Why does that matter? Cardiorespiratory fitness is one of the strongest markers of long-term health we have. We cover that in detail in our VO2 max and longevity explainer.
The stair study that started the buzz
One of the best-known trials comes from Martin Gibala’s lab at McMaster University in Canada. Sedentary young adults climbed a three-flight stairwell (60 steps) vigorously, three times a day, with one to four hours between climbs. They did it three days a week for six weeks, against a group that did nothing (12 people in each group).
The climbers finished with higher peak oxygen uptake than the control group. The authors called the gain modest, but remember the dose: a few minutes a week. McMaster also reported the climbers were stronger and produced more power on a maximal cycling test. “The findings make it even easier for people to incorporate ‘exercise snacks’ into their day,” Gibala said.
Blood sugar (glucose)
A 2014 trial in Diabetologia tested snacks before meals in nine insulin-resistant adults (seven men). On one day they did a single 30-minute moderate walk before dinner. On another, they did “exercise snacking”: six one-minute bursts of hard incline walking, each followed by a minute of slow walking, finished 30 minutes before breakfast, lunch and dinner.
The snacks lowered blood glucose in the three hours after breakfast by 1.4 mmol/L, beat the continuous walk after dinner, and cut average 24-hour glucose by 0.7 mmol/L. The effect was still there the next day, Healio reported. A version that mixed walking with resistance moves worked just as well.
Nine people is a tiny trial, so treat this as promising, not proven. And note the 2025 review found no clear effect on broader cardiometabolic markers.
Longevity: the one-minute bursts in everyday life
A 2022 University of Sydney study in Nature Medicine, led by Emmanuel Stamatakis, looked at wrist-tracker data from more than 25,000 UK Biobank adults who said they did no sport or exercise in their leisure time. Some still did short bursts of vigorous movement in daily life: power walking on errands, running for the bus, hard play with the kids. The researchers called it VILPA (vigorous intermittent lifestyle physical activity).
Over seven years, three to four one-minute bursts a day were linked to up to 40% lower risk of death from any cause and from cancer, and up to 49% lower risk of death from cardiovascular disease, compared with no bursts at all (ScienceDaily, Nature Medicine). “A few very short bouts totalling three to four minutes a day could go a long way,” Stamatakis said.
That study is observational, so it shows a link, not cause and effect. Still, it fits neatly with the trial results.
The key studies at a glance
| Study | What it found |
|---|---|
| Rodríguez et al., BJSM 2025 (11 trials, 414 inactive adults, 4 to 12 weeks) | Better heart and lung fitness in adults; better muscular endurance in older adults. No clear change in leg strength, body fat, blood pressure or blood fats. About 83% adherence. |
| Jenkins et al., 2019 (24 sedentary young adults, 6 weeks) | Three fast climbs of 60 stairs a day, three days a week, raised peak oxygen uptake versus no exercise (a modest gain). |
| Francois et al., Diabetologia 2014 (9 insulin-resistant adults) | Six one-minute hard walking bursts before each meal lowered 24-hour glucose more than one 30-minute walk. |
| Stamatakis et al., Nature Medicine 2022 (25,000+ non-exercisers, 7 years) | Three to four one-minute vigorous bursts a day linked to up to 40% lower all-cause death risk and up to 49% lower cardiovascular death risk. |
Where exercise snacks fall short
- Short trials. The longest ran 12 weeks. Nobody knows yet how snacks compare with full workouts over years.
- Not a strength or muscle program. The review found no significant effect on leg strength. If you want to get bigger and stronger, you still need proper lifting sessions.
- No fat-loss magic. Body fat, blood pressure and blood fats didn’t shift in the pooled data. The authors note most people started out fairly healthy, leaving less room to improve.
- Mostly women. About 69% of the review’s participants were women. That doesn’t mean men respond differently, just that the data is thinner for us.
- Intensity matters. Go too soft and you won’t trigger much change. Go flat out with no warm-up and a cold hamstring may let you know about it.
Our read: exercise snacks aren’t a replacement for training, they’re a floor. On weeks when life blows up your schedule, they stop your fitness sliding backwards. For blokes coming off the couch, they’re the easiest on-ramp there is.
10 ready-made five-minute exercise snacks
Pick one, do it, get on with your day. Each one takes five minutes or less. Aim to finish breathing hard but not wrecked. These are starting points; adjust reps to your fitness.
| Snack | How to do it |
|---|---|
| 1. Stair sprints | Run up three flights as fast as you safely can, walk down. Repeat two or three times. The closest thing to the McMaster protocol. |
| 2. Burpees | Five rounds of 20 seconds on, 40 seconds off. Drop the push-up or the jump to scale it down. |
| 3. Kettlebell swings | Five rounds of 15 swings, resting about 30 seconds between. Hinge at the hips; it’s not a squat or a front raise. |
| 4. Squat jumps | Four rounds of 10 jumps, 30 seconds rest. Swap for fast bodyweight squats if your knees or the downstairs neighbours object. |
| 5. Push-up ladder | 1 push-up, rest a breath, 2, then 3, up to 10 or until form breaks. Use a desk for incline push-ups at work. |
| 6. Hill or incline power walk | Five minutes walking hard up a hill or a steep street, fast enough that talking gets difficult. |
| 7. Skipping rope | Five rounds of 30 seconds fast skipping, 30 seconds rest. |
| 8. Walking lunges | Two to three minutes of continuous walking lunges up a hallway, then 20 fast bodyweight squats. |
| 9. Mountain climbers and plank | Four rounds of 30 seconds mountain climbers, 15 seconds plank, 15 seconds rest. |
| 10. Chair stands (beginners and over-60s) | Stand up from a chair and sit back down, without using your hands, for 30 seconds. Rest 30 seconds. Repeat three to five times. |
Need form help? We’ve got guides to kettlebell training, push-up variations, lunges, box jumps and battle ropes, which also make a brutal 60-second snack.
How to fit exercise snacks into a workday
The trick is to tie snacks to things you already do, so you don’t have to remember them.
- Before meals. A snack before breakfast, lunch and dinner gives you three a day and matches the blood sugar study.
- Take the stairs, fast. Every time you’d use the lift, run the stairs instead. Space them out, as in the McMaster trial: one to four hours apart is plenty.
- Between meetings. Five minutes between video calls is enough for a push-up ladder or a set of squats.
- Make the commute count. Walk hard up the last hill, or get off a stop early and power walk. That’s VILPA.
- Keep a kettlebell in sight. If it’s next to your desk or the kettle, you’ll use it. Out of sight in the shed, you won’t.
- Count days, not minutes. Don’t fret about weekly totals. Track how many days you got your snacks in.
If you’re inactive or older, start small and slow: one or two snacks a day at a pace that gets you breathing harder, then build. If you have a heart condition or other health concerns, check with your GP before adding near-maximal efforts.
Already training? Layer snacks on top of your normal program, or use them on rest-from-gym days. Pair them with a couple of proper sessions a week from our HIIT workouts or VO2 max workouts, and don’t neglect strength training, especially past 50. Short on time for core work too? Try our quick ab workout.
In the end, you don’t need perfect conditions or hours of free time to improve your heart and lung fitness. Two honest, hard snacks a day will move the needle. It’s not a full workout, but it’s a damn sight better than nothing, and for many men it’s the gateway to doing more.
FAQs
What is an exercise snack?
A short burst of exercise, usually five minutes or less, that gets your heart rate and breathing up, done several times through the day. Running up a few flights of stairs is the classic example.
Do exercise snacks really work?
For heart and lung fitness, yes. A 2025 review of 11 randomised trials found exercise snacks improved cardiorespiratory fitness in inactive adults, with moderate-certainty evidence. They didn’t clearly improve strength, body fat, blood pressure or blood fats.
How many exercise snacks a day should I do?
The trials used at least two a day, at least three days a week. Three a day (for example, one before each meal) is an easy target to remember.
How long should an exercise snack be?
Five minutes or less. Some of the best-known studies used even shorter efforts, such as one fast climb of three flights of stairs.
Can exercise snacks lower blood sugar?
One small trial says they can. Insulin-resistant adults who did six one-minute hard walking bursts before each meal had lower 24-hour glucose than when they did one 30-minute walk before dinner. It was only nine people, so more research is needed.
Can exercise snacks replace the gym?
Not entirely. They’re good for fitness and getting started, but they won’t build much muscle or strength. Use them as a floor on busy weeks and an add-on to regular training.
Are exercise snacks safe for older men?
The trials included older adults, who mostly did leg strength moves and tai chi and improved muscular endurance. Start with gentle options such as chair stands, and talk to your GP first if you have a heart condition.
