Invercargill Mayor Tim Shadbolt gets his health check in the Invercargill City Council foyer from nurse Barbara Docherty, as part of Dr Tom Mulholland's roadshow of the south.

Invercargill Mayor Tim Shadbolt has been on a health kick to lower his blood pressure, turning up the Olympic games and turning down the salted candy.

Shadbolt was one of about 130 people in Invercargill to have received free health checks by Dr Tom Mulholland in the past fortnight.

Shadbolt said last week's visit from Dr Tom revealed his blood pressure was up.

"I was fine for diabetes, fine for cholesterol, but I had slightly high blood pressure because it's caused by salt and stress," he said.

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"[Dr Tom] said cut those out, and you should come right."

Shadbolt said he made changes immediately after the test.

He made a conscious effort to cut down on salted confectionary, of which his favourite was salted liquorice.

"I usually get it [salted liquorice] from Christchurch, and I stock up on it."

Shadbolt said he got a taste for the liquorice when he was six-years-old, in Holland.

Shadbolt's other favourite food was veal, which he said was hard to cut out.

"I have just had to cut right back on everything with salt in it," he said.

"It's hard, because you've got to read all the ingredients and see how much sodium is in the food you've been eating."

Shadbolt had also worked in more walking and exercise to his days to combat high blood pressure.

As for the relaxing, Shadbolt was making the most of the Rio Olympic Games.

When he visited the doctor on Monday he was told his blood pressure was back to normal.

Shadbolt said he was delighted by the result and felt much less stressed.

Dr Tom, is an author, personality and former Southland Hospital Emergency Department doctor.

He was in Invercargill for a fortnight and visited various locations to test unsuspecting citizens for health conditions.