Observed: Spine tilt measured ~39°, which is inside the healthy 15-45° window, and you have real knee flex (lead ~37°, trail ~28°). However your upper back looks quite rounded/hunched rather than a tall, hinged athletic posture — the chest is collapsed over the ball.

Good: Good hip hinge and knee flex give you a solid, grounded base, and your spine tilt number is right where it should be for a 7-iron.

Improve: Flatten the rounded upper back — stick your chest out and hinge more from the hips so your shoulders can turn freely. A hunched back physically blocks rotation, which ties directly into your #1 issue.

Observed: By the takeaway frame the shaft is already lifting toward vertical while your body stays completely still. The club is being picked up with the hands/wrists rather than moved back by a turning chest.

Good: Your head and lower body are rock-steady — no lurching or sway at the start.

Improve: Start the club back by turning your shoulders and letting the arms, hands and club move together as one unit for the first foot or two. Right now the wrists hinge and the arms lift immediately, which sets up an all-arms swing.

Observed: This is the heart of the problem: measured shoulder turn at the top is only ~3.7° and hip turn ~0.7° — essentially zero body rotation. The club goes almost straight up while your torso stays square to the ball. Head sway is a tiny 1.8 cm.

Good: Excellent stability — your head barely moves (1.8 cm) and you keep your posture, which is a great foundation once we add turn.

Improve: You need a real shoulder turn — aim to rotate your back toward the target so your lead shoulder ends up under your chin (goal ~80-90°, you're at ~4°). Think 'turn, don't lift.' The power in a golf swing comes from coiling the torso, not raising the arms.

Observed: With no coil (X-factor measured ~3° vs a 25-55° target) there's nothing to unwind, so the lower body has nothing to initiate. Tempo read 4.0 but the clip had 3 swings with very noisy timing (2.03±1.97), so I wouldn't trust that number.

Good: You stay balanced and centered into the change of direction.

Improve: Once you create a genuine turn, feel the transition start from the ground — a small pressure into the lead foot and a turn of the hips before the arms come down. Can't build lag or sequence without first building the backswing turn.

Observed: The mid-downswing frame looks almost identical to the top — the body hasn't rotated, so the arms simply lower the club back down the same steep track it went up. Hard to judge true path from a backlit face-on angle.

Good: Head stays behind the ball and steady, and you're not casting violently or losing balance.

Improve: Rotate your hips and chest open toward the target as the club comes down, rather than dropping the arms with a static body. Body rotation is what shallows the club and delivers speed.

Observed: At impact hips are only ~1.1° open and shoulders ~6.8° open — you're essentially square to the ball with no rotation, and hip slide is ~0 cm. Ideally your hips would be 30-40° open and weight moving forward.

Good: Your head is stable (~1.1 cm) and you stay in your posture through the ball.

Improve: Get your hips and belt buckle rotating open toward the target through impact. A square, non-rotating body at impact leads to weak, scoopy contact and inconsistent strikes with an iron.

Observed: The finish frame shows your arms extended high overhead, but the body still hasn't rotated — measured finish shoulder turn is only ~8.3° (goal 75°+). So it's an arm-lift finish, not a rotational one, though you do stay reasonably balanced.

Good: You hold your balance and get the arms fully extended up — the framework of a finish is there.

Improve: Turn your chest and belt buckle to face the target with your weight stacked over the lead foot. A full, rotated finish is the single best sign the whole swing sequenced correctly.