A medical treatment on his troublesome knee that’s designed for osteo-arthritis is helping St Kilda captain Nick Riewoldt find his best form in years.

Ahead of their clash with Collingwood at the MCG on Saturday night, the in-form 29-year-old bristled when asked if he was starting to feel like the Riewoldt of old.

“I’m still the good side of the 30, so I’m not sure how well that sits with me,” he said.

Riewoldt revealed that he has undergone therapy called Orthokine, devised by German doctor Peter Wehling, which has also proved a great success with US basketballer Kobe Bryant and baseballer Alex Rodriguez.

It involves injecting proteins from the patient’s own blood back into the joint.

“We’ve managed it really well this year. We’ve tried a few different things over the last couple of months medically so we’ll continue to do those and hopefully it will be problem free for the rest of the season,” said the All-Australian forward.

“I’m sure there’s a few players in the competition that are doing it and it’s given me a bit of a lift in the second half of the year.

“I don’t think I’ve had some of the highs I’ve had in the past but I haven’t had too many quiet games so hopefully I can keep that consistency going.”

He said that he was now able to train more than he had in recent years, which was key to his revival, particularly in the second halves of games.

“It plays such a big part, if you’re able to get out Monday to Friday and have a run around you’re able to stay pretty fit and you go into a game with a level of confidence.

“If you haven’t trained during the week and you do that for two or three months on end it can have a hit on your confidence.”

St Kilda had a crushing 76-point win over the Western Bulldogs last round to remain in touch with the top eight, in 10th position.

Riewoldt said he felt it was a good time to meet the fourth-placed Magpies because a win could be a springboard into the finals.

“This time of year if you want to be contending you’ve got to be beating or at least being competitive against those sorts of sides,” he said.

“Clearly it’s a big challenge, Collingwood are a great team but so are we at times.”

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