HONGKONG triathlon has been given a shot in the arm with an international sportswear company injecting up to $2 million into the sport over the next three years. The sponsorship by Puma will be used mainly on the development of the sport in the territory from grass roots up to international level. ''We have an active junior programme and the backing from Puma will ensure this continues to expand,'' said David Woodhouse, Hongkong Triathlon Association president. ''We plan to use part of the money to organise eight introductory courses on the sport, throughout Hongkong, Kowloon and the New Territories.'' Puma will be the official backers of next month's Hongkong International Olympic Triathlon on Lantau Island and the Hongkong International Sprint Triathlon in September, at Sai Kung. The company will also be sportswear sponsors for the popular Canon Ironkids and in addition will kit-out national squads. Individual competitors Tony Chui, Cheung Man-ho, Brian Bozarth, Don Bozarth Junior and junior woman triathlete Bobo Lee Wing-yee will also have their equipment provided by the firm. It was also announced yesterday that the Government's Sports Development Board had increased the triathlon association's block grant and will fund a new position of coaching director to be filled by Ruth Hunt, currently in Australia for the Arafura Games.