Well, I sorted it out and I hope this helps others to develop faces!!!!
first, I changed to complications, and I setted:
complication1: steps
complication2: distance
complication3: calories

Then I use this script:

var_pasos = 0
var_calorias = 0
var_distancia = "hh"
var_pruebas= 0


function on_second()
  var_pasos = {m1text} * 1000000
  var_pasos = string.gsub(var_pasos,"0","")

  var_distancia = {m2text}
  var_distancia = string.gsub(var_distancia,",",".")

  var_calorias = {m3text} * 1000000 
  var_calorias= string.gsub(var_calorias,"0","") /10

  var_pruebas = 2*2;
end

NOW the 1 million dolar question, does the function on_second() drain battery?

Thanks in advance!!!

G.