投球距離
投球距離とは、ピッチングラバーからホームベートまでの計測距離のことです。スローピッチソフトボールでは一般的に50フィートですが、一部のユース部門では46フィートが使われ、USSSAでは投手がピッチャーズプレートから最大6フィート後方からリリースすることも認められています。
投球距離が長いほど、ボールはアークを完成させるためのより多くの時間と空間を得られ、急な落下角度を作りやすくなります。距離が短い場合は、同じアークウィンドウに収めるためにより急なリリース角度が必要になり、投手のミスの許容範囲が狭くなります。距離が長いリーグの打者はアークを読む時間が長くなりますが、その分より辛抱強くなければなりません。距離が短いリーグではより素早いタイミングが求められます。
Before your first game at a new distance, throw 20 warm-up pitches in particular to re-calibrate your arc feel for the new rubber location.
Film yourself pitching from both 46-foot and 50-foot rubbers and compare release angle and step length — those differences are your calibration targets when switching leagues.
Example
46フィートから50フィートの投球距離に移った投手は、ボールが自然により高く上がり、ゾーンに落ちるまでの時間が長くなることに気づく。
How it shows up on video
On video, measure the rubber-to-plate distance using a known reference (base path = 65 feet in slow pitch. USSSA uses 65 or 70) and confirm it matches the stated league distance. Watch the pitcher's stride length as a proportion of the pitching distance. This means a very short stride at 50 feet often indicates poor forward momentum and arc uneven results. Reviewing total ball flight time across pitches helps batters calibrate their load timing for the specific distance.
Common mistakes
- Pitchers not adjusting release angle when moving between 46-foot and 50-foot rubbers, causing arc-height violations at the new distance
- Batters using the same load timing from a different-distance league without adjusting, arriving reliably early or late
- Coaches not confirming the official pitching distance before warm-ups, leading to a mechanical surprise on the first inning pitch
- Pitchers overcorrecting at longer distances by pushing harder rather than adjusting angle, increasing speed beyond league limits
In SwingVantage Motion Lab
SwingVantage can calibrate its arc and timing analysis to the specific pitching distance entered by the user, ensuring all angle and flight-time measurements are accurate for the league context.
Related terms
Related guides & benchmarks
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