One-Arm Incline Push-Up — support ~90 cm

Push horizontal · reps · unilateral The entry into loaded one-arm pressing. Modest load, mild anti-rotation demand — the work is to groove the press pattern and lock in a reproducible straight-line setup.

The movement

One hand on a high stable surface (worktop or tall box with a free edge, ~90 cm), body leaning at a gentle angle, feet on the balls of the feet. Lower the chest to the edge and press back, on one arm. The other arm is parked. Do all reps on one side, then switch.

Set-up — and what each part is for

Face a stable surface at roughly 90 cm with a free edge to clear the head. Working hand under its shoulder, fingers spread.
Feet on the balls of the feet, heels lifted and driven back, toes pointing straight ahead. Shoulder-width — held constant across every incline tier.
Distance to support (relative). Walk the feet back until the body is one straight line, crown to heel, with the working shoulder stacked over the hand at lockout. Measure your toe-to-support-base distance and reproduce it every session — a few centimetres changes the angle and breaks the continuity of the chain.
Free hand parked in the small of the back.
Body one straight line. Glutes squeezed, abdominals braced, ribs down. Pelvis square to the floor.
Working shoulder packed down; hand screwed into the edge — outward rotational intent.
Head neutral, chin clearing past the free edge of the support.

The rep — rehearse it before you do it

Down (1–2 s). Elbow tracks back ~45°, chest descends toward the edge. → Feel the working chest and triceps take the load, with the first faint call on the free-side obliques to keep you square.
Bottom. Chest at the edge, brief still pause. → Feel the trunk still rigid; the pelvis has not turned toward the free side.
Up. Drive the support away to a complete lockout, no twist.

Watch for

Trunk twisting to assist the press → hold the chest square through the rep.
Range cut short at the bottom → the chest reaches the edge.
Forehead leading instead of the chest → keep the head neutral; the chest measures depth.
Feet sliding → change surface or re-measure the distance.

Breathing

Inhale and brace at the top; pressurized exhale through the press out of the bottom.

Within the level

Harder: slow the descent to 3 s; pause at the bottom.
Easier: widen the feet for a more stable base. If balance is the limiter, rest the free-hand fingertips on the support beside the working hand and lean on them less over time.

Dose

Test a clean max on each side; work at half of the weaker side (rounded down), max 5 reps per set, same count both sides, weaker side first, spread through the day. Stop each set well short of failure.