Roy Cairns, 58, was diagnosed with liver cancer in 2019. Twelve months later a tumour was found on his lung.
Mr Cairns said taking part in the cancer prehab programme piloted by the Northern Ireland's South Eastern Health Trust after his second diagnosis was a "win-win", not only for himself but also his surgeons.
"I think when you get that diagnosis you are left floundering and with prehab the support you get gives you focus and a little bit of control back in your life," he said.
Prehabilitation (prehab) means getting ready for cancer treatm