For Heffernan, just getting through a training session is an achievement.

Since breaking his leg in last season's epic 5-4 defeat to Sydney in Gosford, Heffernan has had to endure numerous setbacks.

For a time, it appeared the goalscoring defender was a chance to make his return in last season's grand final.

However, that didn't happen and apart from a few appearances in the pre-season, Heffernan has been restricted to light duties.

"It's been tough, really tough," Heffernan said.

"I got back into some pretty intense training in the pre-season and the leg wasn't ready. I thought I was ready but I was probably in a bit of denial.

"I wanted it to be right. As soon as I copped a knock on it in the Pre-Season Cup (against Wellington) I couldn't walk for three or four days."

Further tests revealed the injury had not healed properly and Heffernan was again forced out for a long period.

He has only recently begun to increase his training but the Mariner has boldly predicted a return to the field in the 'next month or so' and his return will serve as a welcome boost for the reigning premiers.

"The doctor has given me the all clear, it's feeling a lot better," he said.

After such a long lay-off, Heffernan will probably return via the National Youth League before attempting to force his way into the Central Coast's first XI.