Maximum Heart Rate

Assignment for
Data Developing Products Course
Data Science Specialization

The maximum heart rate (HRmax) is the highest heart rate an individual can achieve without severe problems through exercise stress, and generally decreases with age. The most accurate way of measuring any single person's HRmax is via a cardiac stress test. For general purposes, a formula is often employed to estimate a person's maximum heart rate. Some formulas are differentiated between males and females.
Wikipedia
In the next slides we show some examples of HRmax calculated using different formulas.

We create a dataset with age between 18 and 60 and a column with gender, then we compute the maximum heart rate using different formulas.

  dataset <- data.frame( age= rep(18:60,2) , gender= rep(c("F","M"),each=43))    


   dataset$haskell <- round( 220- dataset$age ,0)
   dataset$tanaka  <- round( 208 - (0.7 * dataset$age) ,0)
   dataset$robergs <- round( 205.8 - (0.685 * dataset$age) ,0)
   dataset$gulati  <- rep("Women Only" ,86 ) 
   dataset$gulati[dataset$gender=="F"]  <- round( 206 - (0.88 * dataset$age[dataset$gender=="F"]),0 )   
   dataset$gellish <- round (203.7 / ( 1 + exp( 0.033*(dataset$age -104.3) ) )  ,0)
   dataset$gellish[dataset$gender=="F"] <- round( 190.2 / ( 1 + exp( 0.0453*(dataset$age[dataset$gender=="F"]-107.5) ) ),0)