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Horizontalbruch

Also known as: Run zur Wurfarmseite, Cut zur Handschuhseite, Horizontale Bewegung

Definition

Der Horizontalbruch ist die seitliche Bewegung, die ein Wurf durch Spin erzeugt, gemessen in Zoll zur Wurfarmseite (positiv) oder zur Handschuhseite (negativ).

Wie beim IVB wird der Horizontalbruch gemessen, nachdem die natürliche Drift herausgerechnet wurde, die ein spinloser Ball hätte. Sinker und Two-Seamer haben positiven (Wurfarmseite) Horizontalbruch; Cutter und Slider haben negativen (Handschuhseite) Bruch. Die Kombination aus horizontaler und vertikaler Bewegung definiert die „Form“ eines Wurfs und wird genutzt, um Würfe zu kombinieren, die gut miteinander tunneln. Extreme horizontale Bewegungswürfe – sweepende Slider mit 15+ Zoll Horizontalbruch – sind zunehmend prominent geworden, seit Trackingdaten Bewegungsprofile handlungsrelevant gemacht haben.

Beginner tip

Learn to read your own horizontal break by pitching in front of a camera set up directly behind the pitcher and watching how far each pitch drifts laterally from the expected straight-line path to the catcher's glove.

Advanced note

Plot your arm-side and glove-side pitches on a movement chart and identify which pairs create the widest horizontal separation at the plate. This means those are your most effective two-pitch tunnels for maximising lateral stress on the hitter.

Example — In einem Trackingsystem-Bericht

Sein Sweeper zeigte 17 Zoll Horizontalbruch und erzeugte Fehlschwünge, wenn Batter einen Fastball erwarteten und stattdessen einen Wurf bekamen, der eineinhalb Fuß wegrannte.

How it shows up on video

Horizontal break is visible on video as lateral movement away from the expected straight-line trajectory. A sweeping slider's break is observable to the naked eye in the final 20 feet of flight. Common errors affecting horizontal break include a spin axis that is too vertical (converting horizontal break potential into IVB), uneven grip pressure that produces varying amounts of side-spin between reps. A shortened delivery that reduces the distance the ball travels and therefore the total movement accumulated before the plate.

Common mistakes

  • Confusing total spin rate with horizontal break potential. This means a pitch can have high RPM but poor horizontal break if the spin axis is oriented vertically rather than laterally
  • Locating an arm-side breaking pitch at the inner edge against same-handed hitters where the movement direction runs toward the plate rather than away from the swing path
  • Maximising horizontal break at the expense of vertical break. This produces a pitch that stays at one height and moves only laterally. This means giving hitters a predictable plane to hunt in the zone
  • Throwing high-horizontal-break pitches from uneven arm angles. This changes the movement direction and makes it impossible to locate the pitch reliably to the intended zone edge

In SwingVantage Motion Lab

SwingVantage measures lateral trajectory deviation across rep sequences and plots horizontal break magnitude on a pitch-shape chart alongside IVB. This gives pitchers a visual representation of their full movement profile. The system identifies whether horizontal break is stable across a session or drifting. This means which can indicate grip fatigue or mechanical uneven results in the wrist and forearm.

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