I run quite a bit, but have never had a problem with them coming loose, and they do provide a very good way of fuss-free monitoring what your blood sugars are doing as you exercise. Also, it can be hard to do a fingerprick test when your hands are cold, wet or sweaty - even if dry, a fingerprick can quickly produce too much blood, and instead of forming a droplet, it 'smears' and often hard to get enough on the strip, leading to wasted strips (for some types of meter) and frustration!.
I don't lift weights, except a few pull-ups on a pull-up bar, but I do also go on a rowing machine from time to time. Some people have real problems getting them to stay stuck though, so obviously varies from person to person, and the solutions mentioned by Matt are fine - just don't stick anything directly onto the sensor, because if you need to take it off before the sensor has expired you might end up pulling the sensor off too!
😱
If you'd like to learn a bit more about managing Type 1 with various types of exercise I'd recommend getting the
Diabetic Athlete's Handbook - it was one of the first books I bought after diagnosis (I wanted to learn how to get back into my running safely) and it explains the physical processes and strategies for different sports very well
🙂
Also, you might want to look at the
Runsweet website (I believe it was started by the guy who helped Steve Redgrave to his 5th gold after his diagnosis)
🙂