A new research has suggested that thousands of cases of breast and bowel cancer could be prevented if people exercised regularly.
Even doing 45 minutes of household chores could be really helpful, said the World Cancer Research Fund (WCRF).
Experts have said that more than 10,000 cases of cancer in the UK could be prevented if people adopted healthier lifestyle.
Rachel Thompson of WCRF said people should aim to be physically active for at least half an hour every day.
"There is now very strong evidence that being physically active is important for cancer prevention," the Scotsman quoted her as saying.
"Even relatively modest increases in activity levels could prevent thousands of cancer cases in the UK every year.
"These figures also show you do not have to go to the gym every day to benefit.
"You can reduce your cancer risk just by making small changes, and this is highlighted by the fact that so many cancer cases could be prevented through something as simple as brisk walking," she said.
Henry Scowcroft of Cancer Research UK, said: "You don't have to be an athlete to reduce your cancer risk.
"There's solid evidence that certain cancers - including breast and bowel cancer - are less common in people who do regular, moderate exercise, such as brisk walking."