Seated press that exposes every weak link.
No leaning back, no leg drive. If you topple, the weight's too heavy.
Sitting on the floor with legs straight out removes every trick the body uses to cheat an overhead press. No leg drive, no lean back, so your shoulders press the entire load while your core fights to hold the torso bolt upright with nothing to lean on. It earns its place as the press that finds your weak links, and lifters who improve their Z press almost always find their standing press moves too.
Because everything that quietly assists a standing press is gone, the leg drive, the back lean, the layback at lockout. A big gap between the two just means the Z press has real work to do for you.
That is tight hamstrings and hips talking. Press from pins in a rack so you can set up properly, work on the mobility separately, and the floor position will come.
Low pins in a power rack at about chest height while seated is the standard. Trying to clean or wrestle a bar into position from the floor sitting down is a fight you do not need.
