Exercise Physiologist and Elite Conditioning Coach Russ Jarrett (M.Ex.Sci.), joined me for a slightly-sciencey chat about all things fitness and exercise. Along the way, we discussed progressive overload, program design, finding the right ‘dose’, how and when adaptation happens, training intensity, recovery, over-training, kids training, periodisation, weight training for strength vs. power vs. hypertrophy vs. muscular endurance and lots more.