The former New Zealand Colts midfield back had to quit the game at 26 due to a degenerative knee problem.
Naufahu, 41, who played Khal Moro in the sixth series of Game of Thrones, was playing for Glasgow in the Celtic League when forced to retire.
The one-time Southland and Canterbury representative told BBC Scotland he struggled to adjust without rugby in his life.
To fill the void he turned to weightlifting, returning to New Zealand to work on construction sites before opening a gym in Auckland.
