Two Huddersfield brothers are set to take part in the British Transplant Games this week.
And both will be bidding for personal glory, the chance to compete at world level - and to be top dog in the sibling rivalry stakes.
Mark and James Brown have both had kidney transplants, having been diagnosed with Alports Syndrome as young men.
Both underwent dialysis in Huddersfield and Leeds before they were selected for transplants.
Mark had his new kidney 20 years ago and James 10 years ago.
Mark, 48, who works as a kitchen designer in Nottingham, is a former Salendine Nook High School and Greenhead College student.
He is in training to compete at the British Transplant Games in Bolton from August 7 and will be taking part for the second time at archery, golf, lawn bowls, darts, the 100m the 100m relay.
He said: “It’s only the second time I will have competed at the games, and after winning medals in darts and lawn bowls last year, I’m hoping to be on the winning podium again.
“James will also be competing and we’ve got a wager on the best placed archer and 100m runner!”
James, 36, of Marsh, works for a plastics firm. He spent a long time on dialysis at St James Hospital, Leeds, and the former St Lukes Hospital in Crosland Moor before his successful transplant.
The British Transplant Games encourages those who have received a transplant to lead active and healthy lives while showcasing the benefits of transplantation. The aim is to raise awareness of the need for more people to sign on to the NHS Organ Donor Register.
In the UK, 10,000 people are waiting for a life saving transplant, and three die each day waiting.
Over 700 transplant athletes from 55 transplant units across the UK will take part. Aged from 2 to 82 they will compete in 20 different sports including archery, athletics, golf, squash, snooker, tennis, cycling and swimming.
Selection for Team Great Britain takes place after these games, and the successful athletes will compete at the World Transplant Games in Argentina next year.