I'm a type one (insulin dependent) diabetic and have a continuous glucose monitor (Dexcom CGM). There's a little sensor wire that I insert under my skin every 7 days and it checks the glucose in my interstitial fluid every 5 minutes, tracking highs, lows and rapid changes. It attaches to a transmitter that Bluetooths to an app on my iPhone. I prefer the app on a daily basis but I do have a separate smaller receiver I feel I might be able to use just as a backup while surfing. I don't want to risk losing my phone or getting it wet.
It's crucial to keep an eye on my blood sugar while surfing because with insulin in my system as a type 1 and my inability to automatically compensate, exercise has the potential to drop it rapidly. It's never held me back from anything, just something I need to be mindful of. Having a hypoglycemic seizure while surfing = no bueno. Currently I'm having to get out every 45-60 minutes to check my blood sugar and drink some juice if needed, but having the ability to just look at a graph on the receiver would mean me not having to get out. It also beeps like crazy if I'm high, low or if it's moving in either direction rapidly so I wouldn't even need to constantly take it out.
For anyone who finds this interesting, I'm a bit of an expert on the subject and have mentored child athletes and families. Insulin receptors increase on cells while exercising as your muscles suck up glucose as fuel, so it actively transports from your blood to your muscle cells very quickly which then lowers your blood sugar. You guys have the necessary tools to sense this and your pancreas puts out less insulin while your liver puts out more glycogen (glucose) from its stores.
If anyone is interested, check it out... it's been one of the greatest advances in managing type 1 diabetes in the last 10 years!
https://www.dexcom.com/get-started-cgm? ... 001LlpgAAC
*class dismissed!

Thanks in advance!