Intermediate

Pag-unat sa Tama

Also known as: full extension, driving through the ball

Definition

Ang extension at contact ay ang punto sa swing kung saan umaabot ang mga braso sa halos buong haba patawid sa contact zone, inililipat ang maximum na energy mula sa kinetic chain papunta sa bola.

Ang tamang extension ay nangangahulugang naga-drive ang mga kamay at barrel patawid sa bola sa halip na humihinto sa sandali ng contact. Ang buong extension ay gumagawa ng mas mataas na exit velocity at mas totoong ball flight. Ang mga hitter na maagang gumuguho — hinihila pabalik ang mga braso bago makumpleto ang pagdaan sa zone — ay gumagawa ng mahina at glancing na tama. Lalong kritikal ang extension para sa outside pitch na contact, kung saan mas malalim natatagpo ang bola sa zone at dapat ganap na umabot ang braso para maghatid ng force mula sa tamang anggulo.

Beginner tip

Think of hitting through two imaginary balls positioned 6 inches apart. This means the first is where you make contact and the second is where your hands are driving through. This means keeping extension alive through both contact points.

Advanced note

Film your swing from the side and measure the angle between your forearms at the contact frame. This means optimal extension shows roughly 150–170 degrees, with full lockout (180 degrees) indicating over-extension and significant fold indicating early deceleration.

Example

Naga-drive ang hitter patawid sa outside pitch na parehong nakaunat ang mga braso sa contact, gumagawa ng malakas na line drive papunta sa opposite field gap.

How it shows up on video

At the contact frame the arms should appear near-fully extended with a slight bend remaining in the lead elbow. This means fully locked-out arms can indicate over-extension that collapses the swing before follow-through. The bat head should be ahead of the hands at contact on all middle-to-outside pitches, confirming full extension reached the ball rather than stopping at impact. Hitters who decelerate through contact will show the elbows folding back before the ball leaves the bat.

Common mistakes

Collapsing the lead arm at contact — pulling the elbow back before the ball leaves the bat — which kills exit velocity mid-swing
Over-extending by fully locking both elbows at contact, which reduces bat speed and produces a casting motion rather than a whipping extension
Confusing extension through the ball with follow-through — extension is at and just after contact, not the circular finish of the swing
On inside pitches, reaching for full extension when the contact point requires the arms to be shorter and the barrel to be more pulled through the zone

In SwingVantage Motion Lab

Motion Lab measures arm extension angle at contact and tracks the rate of arm acceleration and deceleration through the contact zone, identifying whether the hitter drives through the ball or decelerates at impact.

Frequently asked questions

Talaga bang nagdaragdag ng exit velocity ang buong extension?

Oo — ina-maximize ng buong extension ang haba ng arm-lever sa contact, na naglilipat ng mas maraming kinetic energy mula sa rotation ng katawan papunta sa bola kumpara sa maikli at gumuhong posisyon ng braso.

Paano naiiba ang extension sa inside kumpara sa outside pitches?

Nangangailangan ang inside pitches ng contact bago ang buong extension dahil ang contact point ay nasa harap — halos kumpleto na ang extension sa contact; ang outside pitches ay nangangailangan ng mga braso na umabot sa kumpletong extension sa contact dahil mas malalim ang bola sa zone.