Celebrities and hip adults are not the only people flocking to Twitter, the social networking site. Even centenarians have learned to tweet.

Three per cent of US centenarians questioned in a new survey said they use the service that allows users to send short text messages, or tweets, of up to 140 characters at least once a week to keep in touch with their friends and family.

Another 10 per cent sent e-mails to stay connected, 12 per cent shared photos on the internet and four per cent downloaded music from the web.

"These centenarians are really inspiring because they are starting to embrace newer trends and newer technologies," said Sherri Snelling, senior director at Evercare, one of the nation's largest care coordination programmes, which commissioned the survey.

"We know that technology has definitely given us new avenues to stay connected to family and friends, and that is one of the key themes we see in terms of living longer," Ms Snelling said in an interview. "People that are living to 100 and beyond and staying alert and vital are staying socially connected."

The link to new technology is multigenerational, with the centenarians' grandchildren and great-grandchildren introducing them to the latest gadgets.

The results of the survey of 100 centenarians challenge the stereotypes of aging and show that getting older does not have to be a barrier to keeping up with the newest trends.

Forget passing the day in a rocking chair. Fifty per cent of centenarians keep fit by walking or hiking, eight per cent prefer cycling and three per cent break into a jog or run. One percent said they have tried Nintendo's Wii Fit.

More than a quarter said they chatted on a cell phone at least once a week.

To keep their minds as agile as their bodies, 19 per cent played a musical instrument or turned to a musical video game for entertainment or a mental workout.

Nearly 65 per cent would dine with comedian Bill Cosby if given the opportunity to invite a celebrity to dinner.