Hi @Ricardo - you can do the Ramp portion of Half Monty without a heart rate monitor and you’ll get a MAP value, but you will not get an accurate FTP estimation without a heart rate monitor, though you will get an estimated FTP based on your MAP that is more accurate than other Ramp test FTP estimates since we take into account your age, gender and weight into our estimates. But to reiterate - using a heart rate monitor will give you the most accurate FTP calculations from Half Monty.