Bursts of exercise 'could slash risk of major diseases'

Short bursts of daily exercise, even a few minutes - such as running for the bus - could slash the risk of developing diseases such as arthritis, heart disease and dementia.

Taking the stairs, playing actively with children or walking quickly between errands could all have health benefits, according to experts.

A study by researchers in China, included 96,408 people taking part in the UK Biobank study - who wore a device tracking their movement for a week.

Experts compared the data with the likelihood of dying or developing eight health conditions over seven years.

These conditions were: heart disease, irregular heartbeat, type 2 diabetes, liver disease, long-term lung conditions, chronic kidney disease, dementia and immune-mediated inflammatory diseases, which include arthritis and psoriasis.

The study found that people who dedicated a higher portion of their time exercising doing so vigorously had a lower risk of all diseases.

The risk of dementia was 63 per cent lower when compared to people who did no vigorous activity, while diabetes had a 60 per cent lower risk.

The benefits remained even if the time spent exercising intensely was modest, researchers suggest.

Professor Minxue Shen, of the Xiangya School of Public Health at Central South University in Hunan, said intensity was key.

"Vigorous physical activity appears to trigger specific responses in the body that lower-intensity activity cannot fully replicate," he said.

"During vigorous physical activity - the kind that makes you feel out of breath - your body responds in powerful ways.

"Your heart pumps more efficiently, your blood vessels become more flexible and your body improves its ability to use oxygen."

Intensity was more important for reducing the risk of inflammatory diseases such as arthritis and psoriasis, the study found.

However, for other conditions such as diabetes and chronic liver disease, the time spent exercising and intensity were both important.

"Vigorous activity also appears to reduce inflammation. This may help explain why we saw strong associations with inflammatory conditions such as psoriasis and arthritis," he said.

"It may also stimulate chemicals in the brain that help keep brain cells healthy, which could help explain the lower risk of dementia."

Shen said people don't need a gym membership to add intense activity to their day.

"Adding short bursts of activity that make you slightly breathless into daily life, like taking the stairs quickly, walking fast between errands or playing actively with children, can make a real difference," he said.

"Even 15 to 20 minutes per week of this kind of effort - just a few minutes a day - was linked to meaningful health benefits."

Shen said his findings - published in the European Heart Journal - suggest that the "composition of that activity matters, and matters differently depending on which diseases you're trying to prevent".

"This could open the door to more personalised physical activity recommendations based on an individual's specific health risks," he added.

"Vigorous activity may not be safe for everyone, especially older adults or people with certain medical conditions. For them, any increase in movement is still beneficial, and activity should be tailored to the individual."