Linear method for comparison of weightlifters
Petter N. Sæterdal, 2016/10/11  

This calculation is seperately available on the website tau.akbjorgvin.no
tau
Male
Female
bodyweight
total
TAU level = 812
Top level for men
bodyweight;total;name and competition
54.15 ; 152 ; SALEM MOHAMMED Mazen Ali YEM 10.2021 JEDDAH 54.95 ; 294 ; OM Yun Chol. 2019 IWF World Championships 60.8 ; 318 ; Li Fabin. 2019 IWF World Championships 72.85 ; 364 ; Shi Zhiyong. 2021 XXXII OLYMPIC GAMES 95.94 ; 416 ; MORADI Sohrab. 2018 IWF World Championships 108.9 ; 433 ; DJURAEV Akbar UZB 12.2021 TASHKENT 182.9 ; 492 ; TALAKHADZE Lasha GEO 12.2021 TASHKENT
Top level for women
33.45;68.0; VAGI Idau, PNG, 07.2019 44.77;186.0; SUKCHAROEN Thunya, THA, 11.2018 48.23;209.0; PRAMONGKHOL Chayuttra, THA, 11.2018 49.00;213.0; Hou zhihui,chn, 2021 Tashkent 58.55;246.0; KUO Hsing-Chun, TPE, 09.2019 63.40;261.0; DENG Wei, CHN, 09.2019 105.76;331.0; KASHIRINA Tatiana, RUS, 04.2019 150.80;335.0; li wenwen, chn, 2021 tashkent

www.akbjorgvin.no/tau/ Link to description of the method
www.akbjorgvin.no Link to our club websites
tau.akbjorgvin.no Shorter web link



bodyw   total Sinc. Name and info.
55.68   307   481  LONG Qingquan, OL 2016
61.89   333   482  Chen Lijun, 2015 Houston WC
68.68   359   484  Liao Hui, 10.11.2014 Almaty
78.65   387   481  Perepetchenov, Russian GP, 2003.09.27
93.52   418   478  Ilya Ilyin, London 2008
104.4   437   479  Ilya Ilyin, 5th Russian president cup
113.01  447.5 478  Chigishev, EC 2003
124.13  460   479  Chigichev. OL 2008 Beijing
157.34  473   474  Talakhadze Lasha, 2016 OLYMPIC Rio
  Looking at Sinclairs calculation
This table shows some of the best results in the world during the last years. In the Sinclair coloumn the results are between 474 and 484. Lasha Talakhadze, the weightlifter with the highest total gets a lower Sinclair-level then all the others. In my opinion the 473 kg total is the ultimate world top result and there is no reason it should be considered to a lower value than any of the others along the top line of these results.

Hui Liao in the 69 category has 484 Sinclair points and I find it wrong that his result is calculated as better then the others along the top line of weightlifters.



A very simple idea
Inspired by this unfairness I have made an alternative with a very simple linear method. A simple method is also important while only special educated persons are able to understand Sinclairs method based on Least Squares and regression.

The basic idea of the linear method started when i made a x/y plot of all the results in my local club. (bodyweight/total)

This photo illustrates the idea of using straight lines between the top results. You may plot all the results in the world, but only a few will touch the thread and carry the weight of the two discs.

Compared two real results this plot shows one heavier lifter (right-most nail) with a lower total than Lasha Talakhadze. He will offcourse not reach a top level off 1000 points wich stops at the highest peak of the thread.

On the left side it's posible to define a starting bodyweight at 56 kg or probably plot any result that exists among the smallest persons to see how the line goes on the top of these results.

    You may click this photo to see it better

Calculation

The calculation may be very simple as shown in an example:

 bodyw  tot  Name
 84.69  394  Rybakov Andrei
We will have to know the two top level results that surrounds bodyweight 84.69 kg.

The top level (1000) results are listed on top of this page.
The surrounding results are:

  bodyw  tot
  78.65  387  Perepetchenov, Russian GP, 2003.09.27
  93.52  418  Ilya Ilyin, London 2012
  a = 93.52-78.65 = 14.87
  b = 418-387     = 31
  c = 84.69-78.65 =  6.04
  d = c * b/a     = 12.59
  
  LineLevel = 387 + d  = 399.59
  
  Rybakov  = 1000* 394 / 399.59 = 986



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