VETERAN scrum-half Peter Stringer is confident he can play at the highest level into his 40s after joining Worcester Warriors.

The "fitness-obsessed” 39-year-old has arrived at Sixways on a six-month deal as cover for South African international François Hougaard.

Although he is in the twilight years of his career Stringer, who celebrates his 40th birthday in December, says he is not considering hanging up his boots any time soon.

And the former Ireland international believes he is probably fitter than when he made his debut for Munster almost 20 years ago.

“I did (expect to play as long as I am) to be honest,” he said.

“All through my career I could only see myself playing rugby and that’s why I made the decisions in my life to make sure I would last as long as possible in everything I do.

“Sometimes things are taken out of your hands, like with contracts, but for as long as I can play at the top level I think I will (continue) and look to be involved in these big competitions and with these big clubs.

“It makes me happy to be out there running around rather than watching from the stand.

“I can (see myself playing into my 40s). You gauge yourself on fitness tests that you do at the start of each year.

“I have my own sessions I do away from the training ground so I would be the first person to admit when it's time.

“As soon as I stop making my targets I won’t carry on but as long as they are going up and up I will keep going.”

Stringer made his Munster bow in 1998 before going on to make 230 appearances. During his 15-year spell at his hometown club he also carved an illustrious international career, winning 98 caps for Ireland.

After arriving in the Aviva Premiership in 2011 with Saracens on loan Stringer went on to play for Newcastle Falcons, Bath and Sale Sharks.

The number nine is now looking forward to linking up with ex-Munster and Ireland team-mate Donncha O’Callaghan at Warriors.

And with O’Callaghan set to turn 39 next March Stringer admits their tee-total lifestyles have also been key to their longevity.

“In the last five or six years I have really concentrated on every element of my life,” he said.

“I have said numerous times what you put into your body you will get back out.

“I have taken it to a whole new level to try to prolong my career and make the most of it.

“I will live with regret if I don’t do everything possible to make sure I am in the right state of mind and physical shape.

“Donncha is the fittest guy I have come across.

“The two of us have never had a drink of alcohol so whether that’s had something to do with it I don’t know.

“We just love the game and are probably a bit obsessed in keeping fit.

“It doesn’t take any talent to do it. It is just a matter of wanting to do it.”