I'd like to establish my personal maximum heart rate using a DIY method so that I can use it for training with a heart rate monitor. I don't have any faith in the various formulas that are used. Anyone have a link to a good method? The only description of a DIY method that I've found so far isn't clear to me: From "CALCULATING YOUR MAXIMUM HEART RATE (MHR)" http://www.cptips.com/hrmntr.htm#mxhr : "Warm up thoroughly. On a long, steady hill increase effort every minute for at least 5 minutes until you can't go any faster. Then sprint for 15 seconds. Check your heart rate at its maximum for a full 30 seconds and double the number." This throws up some questions: 1) Climbing for 5 minutes "until you can't go any faster" for me means that I would be standing on the pedals at the end. What then am I supposed to do to "sprint"? (per the previous instruction I am already going as fast as I can) 2) What am I expected to do after the 15 second sprint, stop, continue cycling at a reduced effort? 3) I don't understand what "Check your heart rate at its maximum for a full 30 seconds and double the number." means. Checking for a full 30 seconds and then doubling the number suggests that I should use the average heart rate over a 30 second period following the sprint, but this leaves me confused as what is meant by "Check your heart rate at its maximum". If I should use the average HR over the 30 second period following the sprint (doubled), this makes it difficult to use my HRM to measure this figure. It requires me to reset the trip data on my computer and following that reset allow it to measure my HR for 30 seconds. With my computer the only way I can stop it from counting after 30 seconds is to take off the HRM strap. Only then could I use my computer's function that reports the average HR for that period. The alternative of checking my pulse manually isn't really practical either after climbing for 5 minute at full capacity followed by a 15 second sprint. The author of the article hasn't responded to a request for clarification.