Beginner

Ikot ng Braso

Also known as: circle, windmill circle

Definition

Ang arm circle ay ang buong 360° na rotation ng pitching arm sa paligid ng shoulder joint na nagtatakda sa fast-pitch windmill delivery at nag-iimbak ng elastic energy para sa release.

Ang arm circle ang naghihiwalay sa fast-pitch pitching mula sa lahat ng ibang throwing motion. Nag-swing ang braso pabalik at sa itaas ng balikat, umiikot sa likod, at bumaba at pasulong patawid sa balakang kung saan umi-snap ang wrist sa release. Ang fluid at consistent na arm circle ang pundasyon ng bawat pitch — ang mekanika sa paligid nito (push-off, hip rotation, wrist snap) ay lahat konektado dito. Kasama sa mga karaniwang mali ang nasisirang o hindi kumpletong circle, na sumisira sa timing at nagbabawas ng velocity.

Beginner tip

Start every practice session with slow-motion arm circles at walking pace, feeling the full round shape and elbow extension before adding any velocity or stride.

Advanced note

Use a weighted training ball for 20 arm-circle reps at the end of each bullpen session to strengthen the shoulder stabilizers that keep the circle consistent under fatigue.

Example

Gumagamit ang coach ng video para tingnan kung maayos at umaabot sa buong extension ang arm circle ng pitcher sa itaas bago bumaba para sa release.

How it shows up on video

From a side view the arm circle should appear as a smooth, round loop with the elbow fully extended through the top and the hand passing close to the ear before swinging down. This means any flattening or breaking of the circle is visible as a hitch. The top of the circle should reach full extension overhead before the arm begins to descend. An early drop from the top produces a flattened oval that reduces elastic loading. The circle's consistency frame-to-frame across pitches is what confirms mechanical reliability.

Common mistakes

Breaking the circle by bending the elbow at the top, reducing the radius and mechanical efficiency of the delivery
Letting the arm drift behind the body's vertical plane at the top of the circle. This creates a looping delivery path that adds time and reduces power
Rushing the circle so it is not fully complete before the push-off, causing the arm and body to arrive out of sequence at release
Using an overly tight, small circle in an attempt to throw faster, which actually reduces the elastic energy storage and lowers velocity

In SwingVantage Motion Lab

Motion Lab traces the full arc path of the arm through the circle and measures radius consistency, timing relative to push-off, and elbow extension at the top. This means the three key arm circle quality metrics.

Frequently asked questions

Bakit mas epektibo ang arm circle kaysa sa sidearm o overhand na tapon para makagawa ng fast-pitch velocity?

Ang buong 360-degree na rotation ay nag-iimbak ng elastic energy sa mga muscle ng balikat at likod na hindi maaabot ng mas maikling motion, at pinapalabas ito sa pamamagitan ng wrist snap sa dulo.

Paano ko malalaman kung tamang timing ang arm circle ko kasabay ng push-off ko?

Dapat umabot ang braso sa itaas ng circle sa halos parehong sandali na lumapag ang stride foot — kung bumababa na ang braso habang lumalapag pa lang ang paa, nagmamadali ang circle.