<!-- Do not copy any part of this script without permission; James T. Griffing, MS, BS; http://www.planetkc.com/exrx/ //--><!-- 
function calc (form) {
var T, S, W, StandDev, PercRegress, Zscore
W=form.Weight.value*form.WeightUnit.options[form.WeightUnit.selectedIndex].value
S=form.Sex.options[form.Sex.selectedIndex].value
T=form.Minutes.value*1+form.Seconds.value/60
form.VOMax.value = 132.853-0.0769*W-0.3877*form.Age.value+6.315*S-3.2649*T-0.1565*form.HeartRate.value
form.METs.value = form.VOMax.value/3.5
  if (S == "1") {
     form.PopulationAverage.value =
     51.86-0.28*form.Age.value
}
  if (S == "0") {
     form.PopulationAverage.value =
     41.435-0.23*form.Age.value
}
  if (S == "1") {
     StandDev ="6"
}
  if (S == "0") {
     StandDev ="5.5"
}
Zscore = (form.VOMax.value-form.PopulationAverage.value)/StandDev
PercRegress = 0.49402+0.44379*Math.abs(Zscore)-0.082675*Math.pow(Math.abs(Zscore),2)-0.021233*Math.pow(Math.abs(Zscore),3)+0.0060829*Math.pow(Math.abs(Zscore),4)
  if (Zscore > 0) {
     form.Score.value =
     Math.round(PercRegress*100)
}
  if (Zscore <= 0) {
     form.Score.value =
     Math.round((1-PercRegress)*100)
}
  if (Zscore >= 1) {
     form.Rating.value ="Excellent"
}
  if (Zscore < 1 && Zscore >= 0.5) {
     form.Rating.value ="Good"
}
  if (Zscore < 0.5 && Zscore >= -0.5) {
     form.Rating.value ="Average"
}
  if (Zscore < -0.5 && Zscore >= -1) {
     form.Rating.value ="Fair"
}
  if (Zscore < -1) {
     form.Rating.value ="Poor"
}
}
//--> 