Difference between revisions of "Predicting maximal strength"
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| + | 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> | ||
| + | |||
<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]}); | ||
| Line 4: | Line 12: | ||
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}); | + | 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); }; | ||
| Line 17: | Line 25: | ||
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());}]); | + | function(){return "repetitions r = " + Math.floor(r.X());}]); |
brd.createElement('text',[5,1.6, | brd.createElement('text',[5,1.6, | ||
| Line 24: | Line 32: | ||
</jsxgraph> | </jsxgraph> | ||
| + | |||
| + | ===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. | ||
Revision as of 15:38, 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.
