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https://www.nba.com/inside-the-game/player/gravity

https://www.nba.com/news/intro-to-gravity-stat-nba-2025

Gravity is a new way to quantify how much a player pulls defenders out of
their normal assignments, essentially measuring how much attention they draw
compared to what the spacing on the floor predicts.

In simple terms, Gravity tells us who forces defenses to react, even before
they touch the ball.



簡單來說，Gravity告訴我們，哪些球員即使還沒碰到球，就已經迫使防守方做出反應。

Historically, the “eye test” has been the predominant way for spotting how
certain players impact a defensive scheme, whether or not they have the ball.
Coaches and fans have instinctively known which players demanded extra
attention, but now, with the power of AWS AI and Machine Learning, the eye
test just got smarter with the introduction of a new official NBA stat:
Gravity.



Gravity is the NBA’s first stat designed to quantify how much defensive
pressure an offensive player draws both on and off the ball. Leveraging
positional tracking data and powered by advanced Machine Learning models,
Gravity scores show how much a player distorts a defense – opening driving
or passing lanes, shifting rotations, and creating opportunities for
teammates.



The NBA’s optical tracking system uses 3D pose detection to track 29 points
on every player’s body, 60 times per second. Those detailed body-position
coordinates fuel the Machine Learning model, allowing it to capture every
movement and spatial relationship on the floor.



The Gravity model compares the defensive pressure a player would receive on
average based on the location of the ball and their position on the floor
(Expected Defensive Pressure Score) to the pressure they actually draw
(Defensive Pressure Score). The model learns how defenders typically behave
in each scenario, and measures deviations that signal defensive adjustments.
The result is a Gravity differential that measures how much attention a
player pulls from the defense beyond expectation.



The Gravity score measures frame-by-frame impact, expressed as a normalized
value on a -100 to 100 scale, with 0 reflecting the league average. Above 0?
You’ve got pull. Above 80 off-ball? Defenses are terrified of you before you
even catch the ball. Above 90? You’re bending the floor and you’re a scorer
the defense simply cannot blink on. Basically, that player should be guarded
from the parking lot.



Why does it matter? Gravity captures a player’s ability to impact the game
before the play even begins. It highlights players who generate high-value
spacing, draw mismatches, and make their teammates’ job easier – often
without taking a shot. With Gravity, this invisible impact becomes visible,
and the off-ball impact becomes measurable.

Gravity is part of the next generation of stats and insights that we’re
bringing to fans in real-time with the power of AWS AI.



Gravity是NBA運用AWS AI，為球迷即時帶來的下一世代數據與洞察的一部分。

心得:

第一名當然是

https://i.meee.com.tw/B2EIquS.png

"為甚麼我們有人在三分線守Mark Williams。" --JJ Redick

https://i.meee.com.tw/YUPqziA.png

恩 他是對的 笑死

NBA今年10月還有推出預期命中率

https://www.nba.com/inside-the-game/shot-difficulty

動態捕捉的設備越來越完善 可以用的數據也越來越多了

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※ 作者: EZ78 2025-12-26 14:57:03
※ 文章代碼(AID): #1fJZ719U (NBA)
※ 文章網址: https://www.ptt.cc/bbs/NBA/M.1766732225.A.25E.html