New heart research appears to confirm fears COVID-19 has taken a toll on the health of Australians by confining them indoors, deprived of opportunities to exercise and exposed to poor diets and sleep routines.

Nearly half of more than 6000 people who have undergone Victor Chang Heart Health Checks since the start of the pandemic have recorded results considered outside the healthy range.

A specialist team which conducts a mobile testing service across Australia has found cholesterol, blood sugar and blood pressure levels all significantly higher since COVID arrived.

The number of people having at least one test result outside the healthy range since March 2020 increased from 33 per cent to 47 per cent - a relative jump of more than 40 per cent.

Victor Chang Cardiac Research Institute Program manager Anastasia Dounas says for many the COVID effect was real and of serious concern.

"They got out of the habit of going to the gym during lockdown and ate and drank more because they were worried and stressed, leading to weight gain," she said.

"Working from home also led to less incidental exercise and the fear of COVID saw more people choosing to drive to work than catching public transport which resulted in people taking fewer steps each day.

"That all adds up."

Since the launch of the heart check program in 2011 until the onset of COVID in 2020, more than 76,000 participants have been tested with just over a third having one or more results outside the normal healthy range and advised to follow up with a GP.

Within this group, eight per cent were beyond the healthy limit for blood pressure and blood sugar, and almost 30 per cent for cholesterol.

Since March 2020, 6182 participants have been tested with just over 47 per cent having one or more results outside the healthy range and advised to see their doctor.

Of these, 15 per cent were on the wrong side of healthy for blood pressure, 10.5 per cent for blood sugar and 32 per cent for cholesterol.

Heart check nurse Clare Lennon said it was more important than ever to be assessed and start re-engaging with exercise and a healthy diet.

"Heart health checks are vital in revealing if you are at risk of heart disease but can also help prevent it," she said.

"Lifestyle changes or medications can make a huge difference to risk factors but you need to be aware of whether you have high cholesterol, blood pressure, or blood sugar to begin with."