Ambulance Employees Australia members last week unanimously rejected a new pay offer.

They were offered a 3.25 per cent pay rise but, with inflation at 4.5 per cent, the union says this is "impossible to accept".

The Wyndham ambulance officer, who did not wish to be named, told the Banner that normal rostering was two 10-hour days, two 14-hour nights, but only eight-hour rest breaks in between.

"Just the sheer volume of work we are doing is not allowing adequate time to wind down. To do what we do and to deal with the emotional needs of our job we need time out, we need rest breaks," she said.

Paramedics have four days off before starting a new week.

Ambulance Victoria general manager operations Keith Young hit out at the union for highlighting the fatigue issue, saying $185.7 million in new funding would bring an extra 258 paramedics and more than 20 new ambulance teams online.

"It is disappointing that the union is trying to benefit from the issue of fatigue during an enterprise bargaining process while we are actually taking steps and introducing initiatives that will lead to better sharing of workload, reducing the number of night shifts paramedics need to work and generally bolstering staff numbers," he said.

"We recognise the seriousness of the issue of fatigue and are taking steps to address this."

The Werribee paramedic said ambulance officers deserved better than a 3.25 per cent pay increase.

"Just because we save lives and help people doesn't mean we can afford not to be paid a proper wage," she said.

Ambulance Employees Australia state secretary Steve McGhie said paramedics were "bewildered" by Ambulance Victoria's refusal to support 10-hour rest breaks.