The man behind the Power/ Rep Range/ Shock system and the Fiber Damage/ Fiber Saturation protocol is at it again! This time with yet another new training method called FTX2; which tries to hit both slow and fast twitch muscle fibres, but then once you're fatigued, you solely hit the fast twitch fibres. You start with light weight, fatigue the slow twitch, then move on to the fast twitch by using heavier weights.