물체가 외부의 힘을 받아 움직일 때 회전 반작용에 의한 영향을 가장 적게 받는 힘의 작용점을 말한다. 야구 방망이의 이 부분에 공이 날아와 맞을 경우 충격력이 최소가 되므로 가장 멀리 공이 되튀어나갈 수 있다.
타격중심이라고도 한다. 어떤 물체가 외부로부터 힘을 받아 움직일 경우, 어떤 점을 중심으로 회전을 하게 되면 그 물체의 회전축에서 회전 반작용의 영향을 거의 받지 않는 지점이 있다. 즉, 외부의 힘을 가장 적게 받는 작용점이 있는데, 이 작용점을 무게중심과 구분해 격심이라고 한다.
예를 들어 야구에서 타자가 배트를 휘둘러 공을 때리게 되면, 공을 맞히는 순간 타자에게는 충격력이 전해진다. 이때 공을 때리는 배트의 위치에 따라 타자가 받는 충격력은 달라진다. 공이 타자의 손에서 가깝게 맞으면 맞을수록 충격력은 커지고, 반대로 공이 배트의 격심에 정확히 맞으면 맞을수록 충격력은 줄어든다.
다시 말해 타자가 배트를 휘둘러 공이 가장 멀리 날아갈 수 있는 지점이 있는데, 이 지점이 격심이다. 따라서 격심에서 멀어질수록 회전 반작용에 의한 영향을 강하게 받아 타자가 받는 충격력은 커진다. 골프 헤드에도 스위트 존(sweet zone)이라는 표시가 있는데, 이 스위트 존이 무게중심과는 다른 헤드의 격심이다. 이 지점에 맞아야 공이 가장 멀리 날아간다.
[출처] doopedia
2011년 2월 13일 일요일
2011년 2월 7일 월요일
How to mount iPhone4 on your putter
"Tired of endless putting drills? Let science help solve your putting woes!"
1. Hold smartphone in your hand, or mount it on your putter.
2. Start your putting for either a practice or a real putting.
3. Check Rhythm, Tempo, and Consistency Score.
'Putting Science' realizes all kinds of putting instruments by App.
Not cheap but Inexpensive. Feeling+Science. From Tired to Fun
Putt Probabilities
By IAN AYRES
Like many others, I was incredibly jazzed by Tiger’s victory on Monday.
But I was frustrated that the commentators routinely failed to mention the putting distance to the hole. It would be nice to know, “It looks like Rocco has a 25-foot putt.” But I, for one, would like commentators to go further and routinely give us information about the probable outcome of the next stroke. If the golfer is putting, I want to know the probability that the put will go in.
Analogous information is an old hat in basketball. When Kevin Garnett goes to the free-throw line, we are told what his FT percentage has been this season and in the playoffs (and in this very game).
Putting is not as standardized as shooting a free throw. But it would be useful to know that pros generally only make 60 percent of five puts. At least that’s what’s shown in this article (based on pre 1995 data):
[Source] freakonomics.blogs.nytimes.com
Like many others, I was incredibly jazzed by Tiger’s victory on Monday.
But I was frustrated that the commentators routinely failed to mention the putting distance to the hole. It would be nice to know, “It looks like Rocco has a 25-foot putt.” But I, for one, would like commentators to go further and routinely give us information about the probable outcome of the next stroke. If the golfer is putting, I want to know the probability that the put will go in.
Analogous information is an old hat in basketball. When Kevin Garnett goes to the free-throw line, we are told what his FT percentage has been this season and in the playoffs (and in this very game).
Putting is not as standardized as shooting a free throw. But it would be useful to know that pros generally only make 60 percent of five puts. At least that’s what’s shown in this article (based on pre 1995 data):
[Source] freakonomics.blogs.nytimes.com
Woods' performance since the British Open
By Mike Vitti
PGATOUR.com ShotLink Analyst
Tiger Woods equaled his career-best PGA TOUR victory streak over the weekend, winning his sixth consecutive event-the World Golf Championships-American Express Championship- by eight shots. It is obvious that Woods has been playing at a very high level over his last six starts, but the question is: just how good has he been and what has he improved upon to get on such a roll?
• Woods' putting average of 1.713 during the win streak is slightly better than the 1.718 average of current PGA TOUR leader Daniel Chopra.
• Overall, Woods is saving about one stroke per round on the greens; however, the difference in putts per round during the first two rounds is much more significant. In round one and round two before the streak, Woods was averaging 29.75 and 30.25 putts per round respectively. During the streak, he has averaged 27.83 and 27.33 putts per round in the same two rounds.
• Putts measuring between 10 and 25 feet in length are where Woods has improved his performance on the greens. He has improved his percentage of made putts by at least 17 points on putts measuring between 10-15 feet and those measuring 15-20 feet. On putts between 20 and 25 feet, Woods has gone from making 6.3 percent of his attempts to an average of 28.6 percent.
• The improvement in putting during the streak has Woods making an additional 15 feet of putts per round, with his average during the streak exceeding the current TOUR leader, Richard S. Johnson, by about 5 feet.
[source] www.pgatour.com
PGATOUR.com ShotLink Analyst
Tiger Woods equaled his career-best PGA TOUR victory streak over the weekend, winning his sixth consecutive event-the World Golf Championships-American Express Championship- by eight shots. It is obvious that Woods has been playing at a very high level over his last six starts, but the question is: just how good has he been and what has he improved upon to get on such a roll?
• Woods' putting average of 1.713 during the win streak is slightly better than the 1.718 average of current PGA TOUR leader Daniel Chopra.
• Overall, Woods is saving about one stroke per round on the greens; however, the difference in putts per round during the first two rounds is much more significant. In round one and round two before the streak, Woods was averaging 29.75 and 30.25 putts per round respectively. During the streak, he has averaged 27.83 and 27.33 putts per round in the same two rounds.
• Putts measuring between 10 and 25 feet in length are where Woods has improved his performance on the greens. He has improved his percentage of made putts by at least 17 points on putts measuring between 10-15 feet and those measuring 15-20 feet. On putts between 20 and 25 feet, Woods has gone from making 6.3 percent of his attempts to an average of 28.6 percent.
• The improvement in putting during the streak has Woods making an additional 15 feet of putts per round, with his average during the streak exceeding the current TOUR leader, Richard S. Johnson, by about 5 feet.
[source] www.pgatour.com
2011년 2월 5일 토요일
SKLZ Putter Tempo Tray
Description
SKLZ Putter Tempo Tray. Its a great simple little device - Ready to get smooth? Your stroke needs to be silky to keep the ball on the Tempo Tray. Two different settings let you dial up the challenge to give you ideal rhythm and pace. Keep your stroke consistent - then take this feelign out on the course to sink more putts and get that score down.
Trains players to feel the perfect pace for long and short putts
Ball holder design requires smooth tempo to keep the ball on the tray
Helps eliminate the yips
Two different sized holders for varying degrees of difficulty
Tray attaches easily to any putter shaft
[Source] www.golfworx.co.uk
SKLZ® Refiner Hinged Training Club - Putter
Product Information
You can perfect your putting stroke with the SKLZ® Refiner® Putter. The target line hinged putter improves your putting stroke tempo, alignment and distance control. The hinged design promotes smooth acceleration by forcing the player to swing the putter head vs. hitting at the ball (or the putter breaks).
About SKLZ
SKLZ is the innovator in athletic training, and is the premier developer and marketer of athletic performance and skill development training products for serious athletes of all ages. The flagship brand of Pro Performance Sports, SKLZ delivers broad lines of training products across a variety of sports, including baseball, fastpitch, golf, football, basketball, soccer and more. SKLZ focuses on transforming innovative concepts into effective sports training products that help serious athletes of all ages reach their full potential. With international headquarters in San Diego, California, the company delivers durable, high-performance trainers that can be found internationally at major sporting goods retailers, specialty shops, and mass merchants, as well as on the SKLZ web site at www.sklz.com.
[Source] www.espnshop.com
True Ympact (Product Information)
Every year, amateur golfers spend millions on over-sized drivers, premium golf balls, expensive irons, putters and much more.
But let's be realistic.
You could give a Professional PGA Player a $100 set of starter clubs, and they'd still beat the vast majority of amateurs, even if the amateurs are playing with the most expensive gear on the market.
Why? Simply put, 95% of your game has nothing to do with your gear. The PGA Pros know this. They've fine tuned the mechanics of their swing, ensuring that when their club strikes the golf ball, their arms, hands and club face are at the optimum position for impact -- every time.
[Source] www.trueympact.com
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