Craig Kirkwood: Sam Ruthe and Sam Tanner's coach on the pair's victory at the national athletics championships in Dunedin

The coach of Sam Ruthe has praised the acceleration of his charge's rise from exciting prospect to two-time senior national champion. The 15 year old stunned at the national track and field championships in Dunedin - sharing gold in a dead heat with Olympian Sam Tanner over 1500 metres. Craig Kirkwood mentors both Ruthe and Tanner - and he joined Piney to discuss the win. LISTEN ABOVESee omnystudio.com/listener for privacy information.