Zone 4 is between 90% and 105% of your FTP.
My advice is to try the workout called ‘Lamarck’. If you can complete that odds are your FTP is probably in the right ballpark.
Zone 4 is between 90% and 105% of your FTP.
My advice is to try the workout called ‘Lamarck’. If you can complete that odds are your FTP is probably in the right ballpark.