In the absence of Heart Rate Monitors, a simple age-graded calculation can be used to determine Max Heart Rate.  

Team FatBird will use the American sports scientists's modified the basic formula to allow for gender:
214-(0.8 x age) for men, and
209-(0.9 x age) for women

Enter your Age & Gender and let us compute your Max Heart Rate and Team FatBird's FlightZONES!