If you have been following my blog then you'll know that I was having a lot of problems with the so-called soft Heart Rate Monitor strap that comes as standard with the Garmin 310XT. Once I swapped it for the "classic" HRM that came with my now defunct Forerunner 305, the problems seemed to go away. It started playing up again last week so I decided to replace the batteries (although, to be honest, they shouldn't have worn out already). I couldn't find any shops stocking the little CR2023 battery that it was running on. It was only when one of the attendants gave me the sort of look that I expect she would have reserved for somebody looking for a Sega Megadrive that I thought I should do some further research on the internet. Well, I found out a couple of interesting things. First off, according to Garmin, you should wait for one minute after taking out the old battery and before putting in the new one, to give the HRM time to reset (in particularly its battery level). The other thing I learned is that the 2023 in the name of the battery actually means something: the 20 refers to a diameter of 2 centimeters while the 23 means that the thickness is 2.3 millimeters. In fact, there is no difference other than thickness (and corresponding battery life) between the CR2023, the CR2025 and the CR2032. What is more is that Garmin actually recommend the ubiquitous CR2032 as a replacement battery!
In the meantime I have been running quite a bit faster than I usually do. I suspect that it is because my heart rate was also correspondingly higher although I'm secretly hoping that having lost a few kilos since the Ironman is helping me run faster... We will see on the 18th, when I have a Half Marathon in Valladolid. I'm still recovering from the cold that knocked me out last week so I doubt that a PR is on the cards but I'm hoping to have a good solid race in preparation for the Marathon.