Myth or fact: exercise only counts if you work out for an hour
Physical ActivityKey points
- Any activity, even light, is linked to a lower risk of death.
- Benefits rise fastest at the start, going from none to a little.
- There is no minimum session length in current guidelines.
- Several short bouts during the day all count.
Myth: a short workout is a waste of time
Many people skip exercise entirely when they do not have time for a full hour at the gym.
Fact: every minute counts
A meta-analysis of eight cohort studies with about 36,000 adults whose activity was measured with accelerometers found that higher levels of physical activity of any intensity, including light activity, were linked to substantially lower risk of death. The relationship was steepest at the low end: going from very little to a little activity made the biggest difference (Ekelund et al., 2019).
The 2018 Physical Activity Guidelines for Americans (Piercy et al., 2018) and the 2020 WHO guidelines (Bull et al., 2020) removed the old requirement that bouts last at least 10 minutes.
What it means
- A 5-minute walk, a few flights of stairs or a short set of squats all count.
- Combine several short bouts into your daily total.
- When you have more time, longer sessions bring additional benefits.
Frequently asked questions
Is 10 minutes a day worth it?
Yes. In studies, the largest relative benefit is seen when people go from almost no activity to some activity.
Does light activity like housework count?
Light activity is linked to lower mortality too, although moderate and vigorous activity bring larger benefits per minute.
Sources
- Ekelund et al. (2019). Dose-response associations between accelerometry measured physical activity and sedentary time and all cause mortality: systematic review and harmonised meta-analysis. BMJ :l4570. doi:10.1136/bmj.l4570
- Bull et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine 54(24):1451-1462. doi:10.1136/bjsports-2020-102955
- Piercy et al. (2018). The Physical Activity Guidelines for Americans. JAMA 320(19):2020. doi:10.1001/jama.2018.14854
Keep reading
Physical Activity How to start exercising if you have not moved in a long time
Why the biggest health gains come from going from no activity to some, what a study of 660,000 people found and a gentle 4-week plan to start.
Physical ActivityShort, intense workouts: HIIT and "exercise snacks"
What meta-analyses show about HIIT and fitness, and why even 1- to 2-minute bursts of vigorous activity during the day are linked to lower mortality.
Physical Activity Exercise and mood: how physical activity helps with depression and anxiety
What reviews of meta-analyses show about exercise for depression, anxiety and distress, which types of exercise work best and how to start when you have no energy.
Related topics from other pillars
Loneliness, hearing loss and dementia: what you can change
What the Lancet Commission found about 12 modifiable dementia risk factors, including social isolation and hearing loss, and practical steps to lower risk.
Nutrition Vitamin D: who really needs supplements?
What the VITAL trial and a meta-analysis of 81 randomized trials found about vitamin D supplements, and who may still need them.
Physical Activity tools
IPAQ: International Physical Activity Questionnaire (short)
Calculates your MET-minutes per week and your activity level.
QuizDo you meet the Physical Activity Guidelines? Check
Minutes of moderate and vigorous activity per week, plus strength training.
Quiz30-second chair stand test (for adults 60+)
How many times can you stand up from a chair in 30 seconds? Compared with CDC norms.
PDF · TrackerMonthly step tracker
Write down your daily steps and track your progress.
PDF · Log15-minute home strength workout + training log
A no-equipment routine with an 8-week rep log.
PDF · Card + trackerBalance exercises for adults 60+
A safe balance and leg-strength routine with a 4-week tracker.