Find a place with aprox. 20 stairs, not too narrow.1st serie; 8 iterations, walking going up two by two.2nd serie;8 iterations, walking going up one by one.3rd serie; 8 iterations, running going up one by one.4ª serie; 8 iterations, two by two running.Recovering and extensions between series.transferency should by worked then, by 5 progresions of about 20 meters.