Difference between revisions of "Predicting maximal strength"

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This little application tries to predict the ''maximal strength'' (1RM) based on a
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''repetitions to fatigue'' (RTF) value.
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The calculation is based on the so called ''KLW formula'':
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:<math>
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1RM = w\cdot(0.988+0.0104\cdot x+0.00190\cdot x^2-0.0000584\cdot x^3)
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</math>
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<jsxgraph width=700 height=500>
 
<jsxgraph width=700 height=500>
 
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-1,1.8,30,0.8]});
 
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-1,1.8,30,0.8]});
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by = brd.createElement('axis', [[0,0], [0,1]], {});
 
by = brd.createElement('axis', [[0,0], [0,1]], {});
  
var w = brd.createElement('slider',[[24,0.92],[24,1.7],[0,50,200]],{name:'weight',snapWidth:1});
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var w = brd.createElement('slider',[[24,0.92],[24,1.7],[0,50,200]],{name:'weight w',snapWidth:1});
  
 
f = function(x){ return (0.988+0.0104*x+0.00190*x*x-0.0000584*x*x*x); };
 
f = function(x){ return (0.988+0.0104*x+0.00190*x*x-0.0000584*x*x*x); };
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var t = brd.createElement('text',[function(){return r.X()+1;},  
 
var t = brd.createElement('text',[function(){return r.X()+1;},  
 
                                   function(){return r.Y();},  
 
                                   function(){return r.Y();},  
                                   function(){return "repetitions = " + Math.floor(r.X());}]);
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                                   function(){return "repetitions r = " + Math.floor(r.X());}]);
  
 
brd.createElement('text',[5,1.6,  
 
brd.createElement('text',[5,1.6,  
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</jsxgraph>
 
</jsxgraph>
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===References===
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* W. Kemmler, D. Lauber, J. Mayhew, and A. Wassermann: "Predicting Maximal Strength in Trained Postmenopausal Woman",
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''Journal of Strength and Conditioning Research'' 20(4), (2006), pp. 838-842.

Revision as of 14:38, 13 August 2009

This little application tries to predict the maximal strength (1RM) based on a repetitions to fatigue (RTF) value.

The calculation is based on the so called KLW formula:

[math] 1RM = w\cdot(0.988+0.0104\cdot x+0.00190\cdot x^2-0.0000584\cdot x^3) [/math]

References

  • W. Kemmler, D. Lauber, J. Mayhew, and A. Wassermann: "Predicting Maximal Strength in Trained Postmenopausal Woman",

Journal of Strength and Conditioning Research 20(4), (2006), pp. 838-842.