This decline push up places your feet on top of the Bosu ball dome while your hands stay on the floor, raising your hips above your hands and shifting more load onto the upper chest and front shoulders. The dome under your feet also wobbles throughout the set, adding a core and shoulder stability challenge on top of the decline angle.
Log your push up (bosu ball) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.