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Nadagdag na Stroke (Strokes Gained)

Also known as: SG

Definition

Sinusukat ng strokes gained kung ilang stroke ang nakukuha o nawawala ng manlalaro kaugnay ng benchmark (tour average o peer group) sa bawat kategorya ng shot — off the tee, approach, sa paligid ng green, at putting.

Ang strokes gained ay isang statistical framework para sa pagsukat ng golf performance na inihahambing ang resulta ng golfer sa bawat shot sa inaasahang bilang ng stroke na kakailanganin ng scratch golfer (0 handicap) para makumpleto ang hole mula sa parehong posisyon. Sa halip na bilangin ang raw statistics tulad ng fairways hit o greens in regulation — na hindi isinasaalang-alang ang kahirapan ng shot — sinusukat ng strokes gained ang aktuwal na kontribusyon ng bawat shot sa panghuling score kaugnay ng baseline expectation. Ang shot na umaakyat mula sa sitwasyong inaasahang mangangailangan ng 3.5 pang stroke tungo sa sitwasyong inaasahang mangangailangan ng 2.0 na stroke ay kumakatawan sa gain na 1.5 stroke kumpara sa expectation, habang ang shot na napunta sa gulo ay may negatibong stroke gained.

Binuo ang strokes gained ni Mark Broadie sa Columbia Business School at ipinakilala sa professional golf statistics noong unang bahagi ng 2010s, na mabilis na naging gold standard para sa golf performance analysis sa tour. Karaniwang hinahati ang framework sa mga sangkap — Strokes Gained: Off the Tee (SG:OTT), Strokes Gained: Approach (SG:App), Strokes Gained: Around the Green (SG:ATG), at Strokes Gained: Putting (SG:Putt) — na maaaring ihiwalay eksakto kung aling bahagi ng laro ang nakakakuha o nawawalan ng stroke kaugnay ng baseline ng manlalaro. Para sa mga tour professional, ang baseline ay average na performance ng tour; para sa mga recreational na golfer, maaaring gamitin ang iba't ibang handicap-adjusted na baseline.

Para sa mga recreational na golfer, nagbibigay ang strokes-gained thinking ng actionable na insight sa prioritization ng practice. Ang golfer na nawawalan ng 2 stroke kada round sa putting at 0.5 stroke kada round sa driving ay dapat lohikal na maglaan ng mas maraming oras ng practice sa putting kaysa sa driving — anuman ang saya ng driving practice. Kina-convert ng strokes gained ang emosyonal na allocation ("gusto kong tumama nang mas malayo") tungo sa evidence-based na allocation ("sinasabi ng data ko na mag-focus sa pitching").

Beginner tip

Start tracking your shots by category (tee shots, approach shots, chips and pitches, putts) for 5–10 rounds and count how many shots you take from each area. The area with the most shots relative to par expectations is your largest opportunity for improvement. It is where practice time produces the most scoring improvement.

Advanced note

Use a shot-tracking app (Shot Scope, Arccos, or Game Golf) for a full season and review your strokes gained breakdown at season end. The areas where you lose the most strokes relative to your handicap baseline define your practice priorities for the following season. Golfers who follow data-driven practice prioritization reliably improve faster than those who practice by preference.

Example — Shot-tracking app

Ang manlalarong nakakakuha ng 2 stroke kada round sa mga approach pero nawawalan ng 1.5 sa green ay natutunang i-focus ang practice sa putting, dahil doon nasa scoring gap.

How it shows up on video

Strokes gained is a statistical concept measured through shot tracking data rather than observable in individual swing video. However, the areas where strokes are gained or lost can inform which swing elements should be prioritized in video analysis. A golfer who loses the most strokes around the green would benefit from having short game video analyzed most thoroughly. At the same time, one who loses primarily off the tee would prioritize full-swing video review.

Common mistakes

Using strokes gained data from a single round — strokes gained results are highly variable round to round. Reliable patterns require at least 20–50 rounds of data before conclusions about areas of strength and weakness can be trusted.
Treating strokes gained categories as independent. This means a poor driving result can increase the difficulty of approach shots. This makes it appear that approach is a weakness when the root problem is driving. Categories interact with each other, and causation should be interpreted carefully.
Ignoring strokes gained and practicing what feels good — emotional satisfaction from driving practice does not correlate with improvement potential. Data-driven practice allocation reliably produces faster improvement than intuitive allocation.
Applying tour-level baselines to recreational golf — the average tour player's strokes gained baseline is not appropriate for calculating recreational golfer strokes gained. Handicap-adjusted databases or apps that use appropriate baselines for each skill level are needed for meaningful recreational analysis.

In SwingVantage Motion Lab

SwingVantage uses strokes gained principles to contextualize swing observations. This means when a golfer's tracked data or stated handicap suggests specific areas of weakness (short game, off the tee), the system prioritizes observations relevant to those areas. The concept informs which swing elements are most worth addressing based on their likely impact on scores rather than on technical interest alone.

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