Arc Height Regulation
Also known as: arc window, pitch arc height
Itinatakda ng arc height regulation ang kinakailangang minimum at maximum na taas na dapat abutin ng slow-pitch na delivery — karaniwan ay 6 hanggang 12 talampakan — para tawaging legal na pitch.
Umiiral ang arc window para gawing predictable at hittable ang pitch: sobrang patag at parang fast-pitch ito ang laro; sobrang mataas at bumabagsak ito nang halos diretsong pababa, walang binibigyan na horizontal na timing reference ang mga batter. Tinatarget ng mga pitcher ang gitna ng window (8-10 talampakan) dahil ito ay forgiving, repeatable, at pinapanatili ang mga batter na nag-aalinlangan tungkol sa anggulo ng pagbaba. Judgment call ng umpire ang pagsukat ng arc, kaya't mas mahalaga ang consistency kaysa sa matinding taas.
Pick a visual target. This means like the top of the chain-link fence or the top of the backstop. This means and aim your pitch to peak at or just below that reference on every delivery.
Develop three distinct arc heights (low legal, mid, high) and learn to vary them intentionally within a single at-bat to disrupt the batter's timing rhythm without changing your arm speed.
Example — Sa panahon ng pre-game warm-ups
Consistent na inilalagay ng pitcher ang bola sa 9 talampakang arc, ang sweet spot ng 6-hanggang-12-talampakang legal na window, pinananatiling masaya ang umpire at hindi komportable ang mga batter.
Why it matters
Ang mga pitcher na nakamastera sa arc window ay naglalagay ng pressure sa mga hitter sa halip na nagbibigay ng libreng base. Tinutulungan ng SwingVantage ang mga team na i-track ang mga arc tendencies ng parehong pitcher nila at mga kalaban.
How it shows up on video
Arc height is best verified from a straight side-on camera angle. The ball should peak clearly above the pitcher's head (roughly 6 feet) and preferably at 8 to 10 feet for a hittable arc. A ball that appears to track at or below the pitcher's shoulder-height at its peak is likely under the minimum. A ball peaking above the backstop frame (typically 10 to 12 feet) may be approaching the maximum in leagues that enforce one.
Common mistakes
- Pitching to the same arc height regardless of batter and game situation. This makes every pitch read the same way and allowing experienced hitters to time it perfectly
- Sacrificing arc height for speed in a tight game, which risks an illegal-pitch call and gives the offense a free base
- Not adjusting arc height when pitching into headwinds or tailwinds, allowing wind to push the arc outside legal limits without the pitcher realizing it
- Confusing arc height with backspin. This means adding backspin can increase visual arc height without actually raising the peak. This can mislead pitchers who judge arc by feel rather than measurement
In SwingVantage Motion Lab
SwingVantage measures peak ball height from calibrated side-on video and compares it to the 6-foot minimum, flagging pitches that risk illegal-pitch calls and helping pitchers build consistent arc muscle memory.
Related terms
- ArcAng arc ay ang mataas at looping na flight path na dapat sundin ng legal na slow-pitch na delivery. Hinihingi ng USA Softball ang peak na nasa pagitan ng 6 at 12 talampakan. Sa halip, hinihingi ng USSSA ang hindi bababa sa 3 talampakang arc sa itaas ng release point at nagse-set ng cap sa taas na 10 talampakan sa itaas ng lupa. Ina-time ng mga hitter ang swing nila sa pagbaba ng bola, hindi sa pagtaas nito.
- Legal DeliveryAng legal delivery sa slow-pitch softball ay pitch na inila-release nang underhand na may maayos at tuloy-tuloy na motion at dumarating sa loob ng kinakailangang arc height — karaniwan ay sa pagitan ng 6 at 12 talampakan — sa itaas ng plate.
- Pitch TrackingAng pitch tracking ay visually na pagsunod sa buong arc ng slow-pitch na bola mula sa kamay ng pitcher patawid sa peak nito hanggang pababa sa contact point — ang fundamental na skill na kumokontrol sa timing laban sa matarik na bumababang bola.
Related guides & benchmarks
Put this into your swing
SwingVantage can spot this in your own swing — free to start.
See a sample Slow-Pitch Softball report first