I'm a triathlete, female age 43. Currently at my peak and am fit, am not underweight (but lower end of normal BMI and BodyFat), eat a low carb/low sugar/low fat/lowGI diet but eat frequently and use electroyle/no carb fluids for sessions over 1 hr but when I analyse my HR (Garmin 310XT) across all 3 disciplines I find my HR is well above the tables. My resting HR is 48-50 but I seem to have a max of well over 230 if I am to believe my Garmin HRM ?! But I have a great recovery rate according to the same monitor. I've used this particular monitor for 8 months (daily) and a previous monitor (Polar) also showed very HR. Worked fine on husband. My husband is an acomplished triathlete (qualified for worlds ironman 70.3 this year) who seems to have a heart rate of a dead person in comparison to me so my numbers just don't seem to add up. Hubby wants to blame the HRM but as I had the same problem with the previous one I'm not so convinced. Tonight's interval running session wasn't hard and recovered well between sets but over 1 hr session the avg HR recorded was 207 and max 249. Pretty high for a 43 yr old!!! Mind you, I never wet the contacts. Is that the problem here or should I be concered (I had an ECG about 6 mths ago, all fine). Blood pressue is on low side.