Hi
@tilly97531 and welcome to our forum.
If you have non diabetic Hypoglycaemia, that has been modernised to reactive hypoglycaemia, there are quite a few different types of Hypoglycaemia.
RH is caused by food, in the main carbs and sugars, this why many call it carb intolerance, as any carbs will trigger an episode of hyper/hypo. And all the symptoms you are getting. I can't and won't eat carbs.
When you eat carbs, the amount of glucose derived from them rapidly spikes your blood glucose levels, this is because of a lack of the initial insulin response. This is the trigger for your body to react to the high levels by producing what is known as an insulin overshoot. This will drive your blood glucose levels down into hypoglycaemia, unless you have eaten or drank again, which is what you are doing. But it doesn't stop the symptoms or helping with control, this is why it effects every aspect of exercise. Because of the overshoot of insulin, the body will react again with a liver dump, it is a natural reaction to low levels of blood glucose.
Then because of the symptoms, your brain is telling you to eat more carbs.
It is a vicious cycle.
I can walk miles and some relaxing swimming, but not weights or distance running. But what ever you decide to do, how much exercise is your way forward.
Dietary advice is critical and if you eat very low carb before exercise this might not work. It's a case of trial and error.
I am in ketosis most of the time, I find I can work all day if I fast. I use intermittent fasting and only eat in a five hours window, say from 3pm to 7pm. I don't have a particular time to eat but I won't eat after 7pm, so I know I'm not going to hypo overnight.
Research dietdoctor.com, for dietary advice.
Research exercise on Keto.
Research RH.
Get to know why your body is weird, because the importance of understanding RH and the excess insulin you produce. It is quite a rare condition.
Read our forum. The knowledge is from those who have experienced RH, and of course how we control the condition.
When you have carbs, and you go hypo, if you treat the hypo with more carbs to boost your blood glucose levels, this will cause a rebound effect and the likelihood of getting hypos all day long. This is not healthy. Be careful what eat in the morning, as that will effect your blood glucose levels through the day.
What tests have you had?
Have you got a glucometer?
What meds are you on?
Has your endocrinologist recommended any meds?
I would recommend keeping a food diary and testing to see if your body copes with certain favourite foods.
Let us know how you get on.
Keep safe.