No, I'd say that's a good result 🙂 Clearly, you are used to kayaking if you can do 3 hours of it, and your levels are less likely to fall, or even fluctuate, when you are engaged in a familiar activity that your body is used to - you are using your muscles efficiently because they are trained. The same happens to me when running because I have been a runner for 30+ years 🙂 Also, you are at a good level at 5.9 - your body has two mechanisms it uses to try and keep blood sugar levels stable: insulin (produced by the beta cells of the pancreas) and glucagon (produced by the alpha cells of the pancreas). Detecting the levels of glucose in your blood, your body either releases more insulin, to bring levels down, or more glucagon, which stimulates the liver to release more of its stores of glucose and thus raise levels. This balancing act works extremely well in people without diabetes, so that your levels stay in a very tight range of between about 3.3-6.0 mmol/l. When you have diabetes, the mechanism doesn't work quite so well - with Type 2 the insulin may not be able to quite do the job of lowering the blood glucose due to insulin-resistance in the body's cells. With Type 1 diabetes, the beta cells don't produce any insulin, so it has to be injected/pumped, and this is relatively crude and unpredictable compared to a healthy body.
Well, you did ask! 😱 Hope I haven't made things more confusing for you - the bottom line is, your levels are fine 🙂
