Comments for JudoMetrics.com http://judometrics.com A site devoted to developing metrics for Judo by Lance Wicks. Sun, 10 Jan 2010 16:14:35 +0000 http://wordpress.org/?v=2.9.2 hourly 1 Comment on The ages of Olympic Grapplers (Judo and Freestyle Wrestling). by LanceW http://judometrics.com/2009/12/the-ages-of-olympic-grapplers-judo-and-freestyle-wrestling/comment-page-1/#comment-33 LanceW Sun, 10 Jan 2010 16:14:35 +0000 http://judometrics.com/?p=106#comment-33 Hi, thanks for that analysis and the comments that go along with it. I'm the first to to say that I am not a statistician, so I really appreciate you taking the time and effort to look through the info. I think your point about "<em><strong>...when to retire older compeditors?</strong></em>" is very important. How many squads have players taking up spots (and resources including funding) that are "too old" to be viable medal prospects? Thanks so much for your analysis, if you have any research/analyses that poeple might find interesting, I'd love to be able to share them here on the website! Lance Hi,
thanks for that analysis and the comments that go along with it.
I’m the first to to say that I am not a statistician, so I really appreciate you taking the time and effort to look through the info.

I think your point about “…when to retire older compeditors?” is very important.
How many squads have players taking up spots (and resources including funding) that are “too old” to be viable medal prospects?

Thanks so much for your analysis, if you have any research/analyses that poeple might find interesting, I’d love to be able to share them here on the website!

Lance

]]> Comment on The ages of Olympic Grapplers (Judo and Freestyle Wrestling). by dakotajudo http://judometrics.com/2009/12/the-ages-of-olympic-grapplers-judo-and-freestyle-wrestling/comment-page-1/#comment-31 dakotajudo Sun, 10 Jan 2010 15:52:31 +0000 http://judometrics.com/?p=106#comment-31 I ran an analysis of variance on your data, and it does not support a claim that the age gap between gold medalists and the remainder is changing. The summary AOV: Df Sum Sq Mean Sq F value Pr(>F) Year 3 362 120.7 8.06 2.5e-05 *** Gold 1 7 6.9 0.46 0.4977 Gender 1 123 122.8 8.21 0.0042 ** Year:Gold 3 36 11.9 0.79 0.4972 Year:Gender 3 9 2.9 0.19 0.9011 Gold:Gender 1 9 9.1 0.61 0.4365 Year:Gold:Gender 3 27 9.0 0.60 0.6146 Residuals 1537 23001 15.0 Note that this does not support the claim that average age has increased over years, and that the average age of women judoka is different than men, but there is no significance to the interaction of age by year. According to my analysis, average age of gold medalist (men) ranged from 24.14 to 26.00; this is large compared to difference between gold medalists and the rest (ranging from 24.96-26.19), so a comparison of age of gold medalists to the average age of competitors is somewhat meaningless. Note that the average age of male gold medalists was highest in 2000 at 26.0. The average age of women medalists is more variable than men, but 1996 was an unusual year for that. This might be confounding the entire analysis. Perhaps the more interesting question here is not how to develop young athletes for success, but when to retire older competitors? I ran an analysis of variance on your data, and it does not support a claim that the age gap between gold medalists and the remainder is changing. The summary AOV:
Df Sum Sq Mean Sq F value Pr(>F)
Year 3 362 120.7 8.06 2.5e-05 ***
Gold 1 7 6.9 0.46 0.4977
Gender 1 123 122.8 8.21 0.0042 **
Year:Gold 3 36 11.9 0.79 0.4972
Year:Gender 3 9 2.9 0.19 0.9011
Gold:Gender 1 9 9.1 0.61 0.4365
Year:Gold:Gender 3 27 9.0 0.60 0.6146
Residuals 1537 23001 15.0

Note that this does not support the claim that average age has increased over years, and that the average age of women judoka is different than men, but there is no significance to the interaction of age by year.

According to my analysis, average age of gold medalist (men) ranged from 24.14 to 26.00; this is large compared to difference between gold medalists and the rest (ranging from 24.96-26.19), so a comparison of age of gold medalists to the average age of competitors is somewhat meaningless. Note that the average age of male gold medalists was highest in 2000 at 26.0.

The average age of women medalists is more variable than men, but 1996 was an unusual year for that. This might be confounding the entire analysis.

Perhaps the more interesting question here is not how to develop young athletes for success, but when to retire older competitors?

]]> Comment on Ages of medalists at 2009 Judo World Cup events. by The ages of Olympic Grapplers (Judo and Freestyle Wrestling). | JudoMetrics.com http://judometrics.com/2009/03/ages-of-medalists-at-2009-judo-world-cup-events/comment-page-1/#comment-30 The ages of Olympic Grapplers (Judo and Freestyle Wrestling). | JudoMetrics.com Fri, 18 Dec 2009 20:56:45 +0000 http://judometrics.com/?p=33#comment-30 [...] Wrestlers at the Olympic level, this follows on from the article back in March (2009) on the “Ages of medalists at 2009 Judo World Cup events.” in which the age of Judo athletes competing at a high level was briefly examined.  In this [...] [...] Wrestlers at the Olympic level, this follows on from the article back in March (2009) on the “Ages of medalists at 2009 Judo World Cup events.” in which the age of Judo athletes competing at a high level was briefly examined.  In this [...]

]]> Comment on An examination of BJA Dan grades (Part 2) by Kevin O http://judometrics.com/2009/04/an-examination-of-bja-dan-grades-part-2/comment-page-1/#comment-29 Kevin O Sun, 06 Sep 2009 10:08:02 +0000 http://judometrics.com/?p=56#comment-29 I find the month awarded analysis fascinating. If i could give 'my story' here, I pursued my dan gradings in November, January and finally topping up the points that i needed in February. My reasons for commenting is that perhaps some of my reasons might explain the trends you were not expecting. This is threefold: 1 University calendar Judo seems to be focussed around the end of the year and start of the next, being completely dormant from MAy to September. This will bulk up the winter months results. 2 Big personal efforts are afforded by the desperate around the new year- the resolution bug- this normally fades by the start of march in my experience! 3 The summer months seem to be exceptionally quiet for judo I have been trying to fill diaries over the summer months, and there is very little competitive opportunities about. People presumably go out BBQing and drinking and holidaying instead of going to their Dojo. This info might help, all be stuff already considered. Either way, thanks for the insight! I find the month awarded analysis fascinating.

If i could give ‘my story’ here, I pursued my dan gradings in November, January and finally topping up the points that i needed in February.

My reasons for commenting is that perhaps some of my reasons might explain the trends you were not expecting. This is threefold:

1 University calendar Judo seems to be focussed around the end of the year and start of the next, being completely dormant from MAy to September. This will bulk up the winter months results.

2 Big personal efforts are afforded by the desperate around the new year- the resolution bug- this normally fades by the start of march in my experience!

3 The summer months seem to be exceptionally quiet for judo I have been trying to fill diaries over the summer months, and there is very little competitive opportunities about. People presumably go out BBQing and drinking and holidaying instead of going to their Dojo.

This info might help, all be stuff already considered. Either way, thanks for the insight!

]]> Comment on An examination of BJA Dan grades (Part 2) by LanceW http://judometrics.com/2009/04/an-examination-of-bja-dan-grades-part-2/comment-page-1/#comment-22 LanceW Fri, 24 Apr 2009 08:35:23 +0000 http://judometrics.com/?p=56#comment-22 P.s. Your mosaics are wonderful! I especially like the one of "The Wave". I have that image as a sticker on my laptop. :-) P.s. Your mosaics are wonderful! I especially like the one of “The Wave”. I have that image as a sticker on my laptop. :-)

]]> Comment on An examination of BJA Dan grades (Part 2) by LanceW http://judometrics.com/2009/04/an-examination-of-bja-dan-grades-part-2/comment-page-1/#comment-21 LanceW Fri, 24 Apr 2009 08:32:39 +0000 http://judometrics.com/?p=56#comment-21 Hi, sadly I don't know that information, I might be able to find some of the information from the annual reports but I don't think that they have them all the way back to 1960 on the website. It would also be REALLY painful to get it all from the PDF files. :-) Lance Hi,
sadly I don’t know that information, I might be able to find some of the information from the annual reports but I don’t think that they have them all the way back to 1960 on the website. It would also be REALLY painful to get it all from the PDF files. :-)
Lance

]]> Comment on An examination of BJA Dan grades (Part 2) by MissyWombat http://judometrics.com/2009/04/an-examination-of-bja-dan-grades-part-2/comment-page-1/#comment-20 MissyWombat Fri, 24 Apr 2009 07:17:36 +0000 http://judometrics.com/?p=56#comment-20 The graph showing the number of new dan grades awarded each year...how does it compare to a graph showing BJA membership each year? Are they a similar shape? The graph showing the number of new dan grades awarded each year…how does it compare to a graph showing BJA membership each year? Are they a similar shape?

]]> Comment on A quick test of notation reliability. by LanceW http://judometrics.com/2009/03/a-quick-test-of-notation-reliability/comment-page-1/#comment-19 LanceW Sun, 19 Apr 2009 10:18:42 +0000 http://judometrics.com/?p=36#comment-19 Here is a quick example I received: Segments: 14 BLUE Ineffective Attacks: 17 Effective Attacks: 4 Koka: 0 Yuka: 0 Wazari: 0 Ippon: 0 Penalty: 2 WHITE Ineffective Attacks: 3 Effective Attacks: 4 Koka: 0 Yuka: 0 Wazari: 0 Ippon: 0 Penalty: 0 How does that match up with what you see? Here is a quick example I received:

Segments: 14

BLUE
Ineffective Attacks: 17
Effective Attacks: 4
Koka: 0
Yuka: 0
Wazari: 0
Ippon: 0
Penalty: 2

WHITE
Ineffective Attacks: 3
Effective Attacks: 4
Koka: 0
Yuka: 0
Wazari: 0
Ippon: 0
Penalty: 0

How does that match up with what you see?

]]> Comment on The anatomy of an elite level Judo match (Craig Fallon at 2003 European Judo championships). by Lance http://judometrics.com/2009/03/the-anatomy-of-an-elite-level-judo-craig-fallon-at-2003-european-judo-championships/comment-page-1/#comment-17 Lance Fri, 20 Mar 2009 21:54:45 +0000 http://judometrics.com/?p=38#comment-17 Hi Rhadi, I have been thinking of buying your scouting Product for a while now, I became a fan of yours after Brian Picolo spoke so passionately about you on thejudopodcast.com The late Simon Hicks (of Fighting Films) got me interested in the analysis of players and the action. I have also been very fortunate to have been exposed to Sport Science at University of Bath, from where I know Dave Elmore who did this study. I started this site to share and encourage data collection and analysis in Judo. Thanks coming by and taking the time to comment, I really appreciate it. Lance Hi Rhadi,
I have been thinking of buying your scouting Product for a while now, I became a fan of yours after Brian Picolo spoke so passionately about you on thejudopodcast.com

The late Simon Hicks (of Fighting Films) got me interested in the analysis of players and the action. I have also been very fortunate to have been exposed to Sport Science at University of Bath, from where I know Dave Elmore who did this study.

I started this site to share and encourage data collection and analysis in Judo.

Thanks coming by and taking the time to comment, I really appreciate it.

Lance

]]> Comment on The anatomy of an elite level Judo match (Craig Fallon at 2003 European Judo championships). by Rhadi Ferguson http://judometrics.com/2009/03/the-anatomy-of-an-elite-level-judo-craig-fallon-at-2003-european-judo-championships/comment-page-1/#comment-16 Rhadi Ferguson Fri, 20 Mar 2009 17:22:08 +0000 http://judometrics.com/?p=38#comment-16 From someone who has studied more than my fair share of film on Craig Fallon I am here to tell you that he is one of the few 60kg players that spends that amount of time in newaza. This is the first time that I've actually seen someone do something close to what it is that I do to prepare my clients for competition. This only a part of the whole thing but this is impressive none the less. If you look at Fallon's throw selection you will see that his time in newaza is influence by his throw selection and his throw selection is influenced because of his "finishing" rate in newaza. Very good. Kudos to you for a great analysis. Rhadi Ferguson, PhD From someone who has studied more than my fair share of film on Craig Fallon I am here to tell you that he is one of the few 60kg players that spends that amount of time in newaza. This is the first time that I’ve actually seen someone do something close to what it is that I do to prepare my clients for competition. This only a part of the whole thing but this is impressive none the less. If you look at Fallon’s throw selection you will see that his time in newaza is influence by his throw selection and his throw selection is influenced because of his “finishing” rate in newaza.

Very good.

Kudos to you for a great analysis.

Rhadi Ferguson, PhD

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