STRENGTH ENDURANCE OF ZUU Firstly, training on grass with the groundwork of ZUU is absolutely brutal. Disgusting someone would even say ha ha. Seriously training ZUU on grass is something else. The drag and friction on your hands and feet and legs is subtle but devastating. Especially is this true of kicksits on grass 🔥💯 The uneven surfaces when you do gorillas and reverse bears compound every round. It drains your energy so fast. Gravity just seems so much heavier on grass than a concrete flo