For Ken and Joyce Hogg, donating blood is a way of life.
So much so that the Bridge of Don couple have both given a pint of the red stuff for the 100th time.
Mrs Hogg got into the habit of donating blood almost 50 years ago as her mother and father were also donors.
Now she and her husband, both 66, are fronting a campaign to ensure blood supplies remain high during the Commonwealth Games, when stocks are expected to suffer.
The Hoggs are both coaches at Aberdeen Athletics Club and are already heavily involved with the sporting extravaganza.
They are trainers for Team Scotland’s Achieve 2014, which is helping to inspire the next generation of sporting stars.
Urging people to become donors over the summer period is just another way of supporting their country, Mr Hogg said.
Mr Hogg said the couple’s coaching instinct had led them to try and reach the target of the 100th donation.
“By giving our 100th donation, and being an integral part of the Commonwealth Games celebrations, we are happy to support Scotland twice.
“Coaching is all about planning and targets so I think the coaching instinct may have kicked in a bit when it came to our 100th donation.”
Mr Hogg said they reached the milestone after donating blood every 12 weeks.
He said: “We just feel we are fit and healthy and it is just one small way we can help someone else.”
The Hoggs gave their 100th pints at the Aberdeen Donor Centre this week, with the couple celebrating with the usual cup of tea and chocolate biscuit.
Lynne Willdigg, head of donor services at the Scottish National Blood Transfusion Service (SNBTS), said: “This is a magnificent achievement, and their commitment is most welcome at this time.
“We are in the middle of an unforgettable sporting summer with Wimbledon, the World Cup and preparation for the Commonwealth Games already having a significant effect on the number of people coming forward to give blood.
“As people take time to attend the sporting events, combined with school holidays and the recent great weather, we would like to encourage everyone to come forward and give blood.”
Service chiefs said they would particularly like to welcome donors with the O negative blood group, which can be used to treat any patient in an emergency.
About 14% of all blood issued is O negative.
At present, fewer than 138,000 Scots – or just 4% of eligible donors aged between 17 and 70 – give blood at least once a year.