to see Chris Judd, Timana Tahu and Israel Folau do a gruelling 60min workout session at the SCG. Try the Powerade hydration calculator to measure sweat loss through exercise. Afl's Chris Judd and NRL's Timana Tahu and Israel Folou show how 60 minutes of intense workout can reduce weight by over 1kg through the loss of over 1 litre of fluid. Powerade's Isotonic hydration calculator is a great way for you to estimate how much fluid you need when exercising. Distributed by Tubemogul.