Exercise

I find I get a blood sugar spike as a result of exercise, swimming for example. This is extra frustrating: doing sport which is supposed to be good for you, not breaking the rules, then rewarded with a very high bs reading.
I'd like to know if others with diabetes find that this happens to them .... And what I can do.

Thank you for your help, Andy. Because of what you said, I can understand the difference between lengths of the pool and winter clearing of the garden. Gardening never fails to reduce my blood sugar levels which is cool because I like it. I love swimming but I hadn't really understood why it would often have the undesirable effect of high readings. Now I do and I can try to sort it. Thanks again.