Synchronizing with a Polar HRM
One of my tasks during the development of Smart Zones Beta 2 is the HRM communication module, that allows users to import data about their training sessions to the application. Those cyclist or joggers who use HRM’s know what it means. For the rest, let me briefly explain it.
“HRM” stands for “Heart Rate Monitor”. HRM’s are small portable devices that measure and keep a log of your heart rate, i.e. the pace of your heart beats. Typically, you attach a strap to your chest and it detects the small electrical voltages that your heart produces when it’s working. The other component is a radio receiver that usually has the appearance of a wrist watch. This device computes your current HR, shows that value on its small display, and records the whole sequence of values during your training session. It often polls the strap at intervals of five seconds. The information gathered may be shown in a heart rate graph.
Nowadays you don’t need to be a pro to have one of these gadgets — they are sold with prices around £100 (~ €150) or even less. They are useful to keep your workouts at a high level without overtraining. Also, when you run or cycle, the messages that your body sends to you (about how tired you are, or how intense is the pain in your limbs) are pretty subjective, and highly influenced by psychological factors (e.g. you tolerance and perceptions are not quite the same if you train when you feel like shit). HRM’s, on the other hand, always give you steel-cold measures that you can trust (damn) and let you know in which of your heart rate zones you are putting your heart.
17 Dec 2006 — No comments yet — Computers, Images, Work
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