The Collingwood onballer returned from his freak double hamstring injury in last week's qualifying final loss to West Coast and is adamant he will only keep improving.

But a month after needing surgery on his left hamstring tendon and also suffering a right hamstring injury because of the same round-14 incident, Treloar's recovery was going nowhere.

As Treloar puts it, his recovery was flat-lining.

"I had this one-off (training) session where we were like 'you know, just stuff it, let's just try," he said.

"I got through that well ... and ever since then, it's just been on the up.

"I'm very blessed to be back playing."

Just before the breakthrough running session, Treloar was favouring his left leg when running.

So after a meeting with Collingwood's medical staff, an emphasis was put on strengthening the left hamstring.

He plans to keep up that strength work for the rest of his career and is supremely confident the injury will not happen again.

Treloar was running for the ball on the MCG boundary in the round-14 match against Carlton when he fell forward and suffered the twin hamstring injury.

It is extremely rare for the two hamstrings to go at once.

"I 110 per cent trust the doctors, the physios, the surgeons," he said.

"I know they wouldn't lead me astray.

"You talk about it being a freak accident - I highly doubt anyone and myself for that matter is ever going to do that again.

"It's pretty crazy ... the way I did it, I can't really see myself doing that ever again."

Treloar had to prove his fitness in a match simulation, a few days before the West Coast final.

In his very first play, Treloar went for the ball in much the same way he suffered his hamstring injuries - and nothing went wrong.

"I got the ball out and straight away I thought 'well, I'm fine'," he said.

Despite missing more than two months of football,and feeling like a headless chook early in his comeback game, Treloar also is confident he will only improve in Saturday night's semi-final against GWS.

"I'm going to be much better for the run," he said.

"It feels like it's round two for me coming up and if you talk about the home and away season, you don't really start to tire until midway.

"Being round two, technically, for me, I'm flying."

Australian Associated Press