In this episode of the Coachcast, Kris and Ash are joined by Matt McInnes Watson, aka 'The Plyo Guy' and owner of his own company PlusPlyos, to discuss all things Plyometrics. Including, what a plyometric truly is, where the '0.25' second ground contact time duration came from, his tier system for organising plyometric training and whether it differs for athletes in different sports and different ages.