Research
Research overview
News about the benefits of movement appears all the time: one day walking extends your life, the next a few minutes a day protect you from every disease. Behind these headlines are very different kinds of studies. This section helps you understand which research underpins the WHO guidelines and how not to mistake a single report for the final word.
One study is a question put to nature once. Guidelines appear when the answer comes back the same again and again.
Types of research on movement
| Type of study | What it can tell you |
|---|---|
| Review of many studies | The overall picture, if different research groups reached similar conclusions |
| Experiment with a comparison group | Whether anything changes for people who were encouraged to move more |
| Long-term observation of people | Whether lifestyle is linked to well-being years later, though not always why |
| Laboratory experiment | How the body responds to exertion under strictly controlled conditions |
| One person's story | An interesting experience that proves nothing for anyone else |
How to read a news story about a study
Check what was compared
Did the study include people who moved less, and how else did they differ from the active participants?
Look at who took part
The participants' age, health and lifestyle will tell you how far the conclusion applies to you.
Find out what was measured
Well-being, sleep, endurance or a single lab test are different things, and not all of them matter in everyday life.
Look for repetition
If other research groups have confirmed the result and it is reflected in guidelines, you can trust it more.
Why it is easy to get conclusions about movement wrong
- People who move a lot often smoke less and sleep more, and this affects the results too
- Participants report their own activity and may overstate it
- Ill people may move less because of their illness, rather than becoming ill because they are inactive
- Small studies produce chance results that are not repeated
Read also
- Glossary
Physical activity terms in plain language: intensity, aerobic activity, warm-up, sedentary behaviour.
- Benefit & harm
How to read claims about health benefits and harms: who is speaking, what was compared and which phrases are warning signs.
- Sources
Which guidelines this reference is based on, what we deliberately avoid and where its limits lie.
Sources
- WHO: guidelines on physical activity and sedentary behaviour (2020)
- Ministry of Health of the Russian Federation (Minzdrav): healthy lifestyle materials
This text is based on the guidelines in force at the time of publication. International and national advice on physical activity is updated from time to time, and the right level of activity for you is best discussed with a doctor.