Impact & Compression
The half-millisecond that IS your golf swing.
In plain English
'Compression' is clean, ball-first contact with the face delivering less loft — the strike that feels like nothing and flies forever. It comes from where the club bottoms out, not from swinging harder.
Going deeper
Compressed iron impact = hands slightly ahead, weight on the lead side, ball-then-turf. The data signature is high smash for the club, medium launch, and spin that matches — not exceeds — your speed.
The advanced view
Impact is the only moment the ball cares about: ~0.5ms of contact defined by face, path, attack, dynamic loft and strike point. Everything else in the swing exists only to deliver those five numbers — train impact backwards from the data.
Why it matters for scoring
It's the feeling every golfer chases and the exact thing your launch monitor was built to measure.
How it shows up in your ball flight
Compressed: penetrating start, stable flight, full carry. Uncompressed: high-launch/high-spin floaters or thin bullets.
How it shows up in launch monitor data
Smash factor near the club's ceiling, spin in range for the club, launch matching loft. ShotIQ's Compression flag fires when attack angle goes positive with irons.
Typical values: 7-iron ~1.33–1.38 well struck.
Symptoms
- Well-struck shots that still feel/fly weak
- No divot or a divot behind the ball
- Distance gaps shrinking between clubs
Common causes
- Scooping (positive iron attack)
- Weight back at impact
- Ball position drift
- Casting spending the angle early
How to improve it
- Strike ball THEN turf — divot starts at the line
- Feel hands ahead of the clubhead at iron impact
- Punch shots: half swing, full compression, then scale up
Drills that train this
Related concepts
- ⛏ Low PointWhere your swing bottoms out — the difference between pure and fat.
- 📉 Attack AngleHitting down or up — and why driver and irons want OPPOSITE answers.
- 📐 Dynamic Loft & Spin LoftThe loft you actually DELIVER — not the number stamped on the club.
- ⚡ Smash FactorSpeed you keep vs speed you waste — efficiency in one number.
- 🎯 Strike Location & Gear EffectWHERE on the face you hit it — the hidden hand behind weird curves.
Metric deep-dive: the full guide to this number.
Ask the ShotIQ coach
Questions this concept answers about your data, one tap away in the app:
- “Teach me compression”
- “Why don't my irons feel pure?”