4 ms·

Even things like posture seem to affect my parameters. My temp will be 98.4 while seated but if I stand up and check it, it drops down to 97.9.

jajko 2y ago
Maybe its just not a good enough measure for any form of age? Some folks get obsessed with numbers without seeing bigger picture and focusing on actually important things in life (just general observation, please don't take any of this personally)
Aurornis 2y ago
> My temp will be 98.4 while seated but if I stand up and check it, it drops down to 97.9 Body temperature measurements from outside the body are impacted by changes in blood flow, which will happen when you stand up. Your core body temperature isn't fluctuating, the temperature at the measurement point is changing slightly because you've changed your blood flow. We're constantly losing heat from our bodies to the environment. You could probably get similar measurements if you heavily insulated the entire area around the thermometer and let measurements stabilized. In other words: Don't read too much into this experiment.
lowestprimate 2y ago
How are you taking your temperature? Infrared sensor on the forehead? Infrared only measures surface temperatures and can give false readings of temperature based on how the body "radiator" system is working.
- huytersd 2y ago
  Under the tongue.
- TeMPOraL 2y ago
  The fluctuations aren't that bad. Now, I don't trust the infrared sensors myself, because I can't see the "local gradient" of what they're measuring, nor how it changes momentarily (why does it always take a second or two to measure?), and there certainly are areas on the face that vary by whole degree centigrade in temperature. How do I know? Because I got so annoyed at the IR thermometers that I recently got myself one of those USB-C thermal cameras (UTi721M, specifically). It's like a 256x192 array of IR thermometers, measuring continuously, so you actually see what's going on. Lots of interesting things you can learn that way, for example that cheeks, chin and nose can easily be 1-2℃ cooler than the forehead, or that the neck/throat shows about the same temperature that the forehead, but seems more stable. And, it's much faster to take temp of everyone at home in one go. And then you also can learn a lot about your own environment, too. I highly recommend this to anyone. That said, I found in-ear IR most reliable, and use it as a baseline for health checkups. You do however need to watch out for insertion - if you put the head in the ear too fast and measure immediately, you can get a result that's a degree or two centigrade above correct, which I imagine is because of momentary friction heating.

jajko 2y ago

Maybe its just not a good enough measure for any form of age? Some folks get obsessed with numbers without seeing bigger picture and focusing on actually important things in life (just general observation, please don't take any of this personally)

Aurornis 2y ago

> My temp will be 98.4 while seated but if I stand up and check it, it drops down to 97.9 Body temperature measurements from outside the body are impacted by changes in blood flow, which will happen when you stand up. Your core body temperature isn't fluctuating, the temperature at the measurement point is changing slightly because you've changed your blood flow. We're constantly losing heat from our bodies to the environment. You could probably get similar measurements if you heavily insulated the entire area around the thermometer and let measurements stabilized. In other words: Don't read too much into this experiment.

lowestprimate 2y ago

How are you taking your temperature? Infrared sensor on the forehead? Infrared only measures surface temperatures and can give false readings of temperature based on how the body "radiator" system is working.

huytersd 2y ago
Under the tongue.
TeMPOraL 2y ago
The fluctuations aren't that bad. Now, I don't trust the infrared sensors myself, because I can't see the "local gradient" of what they're measuring, nor how it changes momentarily (why does it always take a second or two to measure?), and there certainly are areas on the face that vary by whole degree centigrade in temperature. How do I know? Because I got so annoyed at the IR thermometers that I recently got myself one of those USB-C thermal cameras (UTi721M, specifically). It's like a 256x192 array of IR thermometers, measuring continuously, so you actually see what's going on. Lots of interesting things you can learn that way, for example that cheeks, chin and nose can easily be 1-2℃ cooler than the forehead, or that the neck/throat shows about the same temperature that the forehead, but seems more stable. And, it's much faster to take temp of everyone at home in one go. And then you also can learn a lot about your own environment, too. I highly recommend this to anyone. That said, I found in-ear IR most reliable, and use it as a baseline for health checkups. You do however need to watch out for insertion - if you put the head in the ear too fast and measure immediately, you can get a result that's a degree or two centigrade above correct, which I imagine is because of momentary friction heating.