Tingkat Pukulan Datar Keras
Also known as: LD%, tingkat liner
Line drive rate (LD%) is the share of batted balls that are line drives, launched at 10 to 25 degrees in Statcast's definition. Liners have the highest expected batting average.
Line drive memiliki rata-rata pukulan yang diharapkan tertinggi dari semua jenis bola pukulan karena dipukul keras, tetap di udara cukup lama untuk mendarat dengan aman, dan sulit dijaring. LD% elite umumnya dianggap 25% atau lebih. Hitter bisa meningkatkan LD%-nya dengan mengoptimalkan jalur barrel agar tetap sejajar bidang lemparan lebih lama, mengurangi rollover, dan memperbaiki sudut serangan agar sesuai dengan lintasan menurun lemparan. LD% adalah indikator kualitas kontak sejati yang lebih stabil dibanding rata-rata pukulan dalam sampel kecil.
Tips by skill level
During tee work, focus on hitting the back half of the ball. The part furthest from the pitcher — and drive it straight back through the imaginary pitcher's mound. This produces the contact geometry that generates the highest line drive rate.
Compare your LD% data across pitch velocity bands in your SwingVantage session reports. A significant LD% drop on high-velocity pitches confirms a timing cause. A consistent LD% decline across all pitch speeds confirms a barrel-path or contact-point cause that does not depend on timing.
Example
Line drive rate 28% miliknya adalah indikator paling jelas dari kualitas kontaknya — ia secara konsisten menyamai bidang lemparan dan memukul bola telak.
Why it matters
Line drives come from a bat path that matches the pitch and meets it squarely. Motion Lab estimates your attack angle and path tilt from your arm movement, but it does not track batted balls, so judge the results yourself.
How it shows up on video
On video, line drive production is associated with a barrel that arrives at the contact point on a matching plane to the pitch trajectory. This makes contact at or slightly above the ball's equator. Common errors that suppress line drive rate include a barrel arriving below the pitch plane (undercutting. This produces pop-ups), a barrel arriving from above the pitch plane (chopping. This produces grounders), and a barrel arriving after the optimal contact zone with the arms still bent (producing weak, pull-side flares rather than hard-hit drives).
Common mistakes
- Confusing line drives with "contact hitting" and reducing swing aggressiveness in an attempt to make more contact — line drives require hard barrel contact, and pulling back swing intensity produces soft grounders and flares rather than true line drives
- Using a barrel path that is too flat or downward across all pitch heights rather than adjusting attack angle to match specific pitch locations — middle-height pitches need a flatter approach than low-in-the-zone pitches
- Treating LD% as a random outcome rather than a mechanical metric — over a sufficient sample, LD% is one of the most mechanically stable statistics available and should be used as a training target
- Neglecting the attack angle dimension of line drive production and working only on barrel path without also verifying that the approach angle at contact is in the 10–25 degree window that produces true line drives rather than flat grounders
In SwingVantage Motion Lab
Motion Lab does not track the ball, so it cannot estimate your line-drive rate. It estimates your attack angle and bat-path tilt from your arm movement, the swing shape behind line drives.
Sources
Related terms
- Tingkat Bola TanahGround ball rate (GB%) adalah persentase bola pukulan yang menjadi grounder — biasanya merupakan indikator negatif untuk hitter berkekuatan, meski contact hitter mungkin menggunakannya secara strategis.
- Pop-Up (Pukulan)Pop-up adalah bola pukulan dengan backspin ekstrem dan sudut peluncuran sangat curam (di atas 50°) yang melambung hampir lurus ke atas dan hampir selalu tertangkap untuk sebuah out.
- Zona BarrelBarrel adalah bola pukulan yang menggabungkan exit velocity tinggi dengan launch angle optimal secara bersamaan — kombinasi persis yang paling mungkin menghasilkan extra-base hit.
- Tingkat Pukulan KerasHard-hit rate adalah persentase bola pukulan yang dipukul di atas ambang exit-velocity yang ditetapkan — biasanya 95 mph di MLB, diskalakan lebih rendah untuk level amatir. Ini mengukur kualitas kontak yang independen dari keberuntungan.
- Kecepatan Keluar Bola (EV)Exit velocity adalah seberapa cepat bola keluar dari bat, dalam mph. Ini adalah metrik batas atas — semakin keras Anda memukulnya, semakin jauh ia bisa pergi.
- Sudut Peluncuran (Pukulan)Launch angle dalam batting adalah sudut vertikal bola meninggalkan bat. Kira-kira 10–25° menghasilkan kontak terkeras dan paling produktif.
Available in other languages
Related guides & benchmarks
Work on the cause
Video shows how you move, not the ball itself. Film one swing to find the movement behind this result — free to start.
See a sample Baseball report first