So I tried to do a 7 day water fast, taking electrolytes and some vitamins. Everything was fine until I had to do some house work bending down and lifting some moderately heavy items so I had to eat something and only completed 5 days 20 hrs of the fast.
What happened was after moving around the items I bent down to install some nuts and when I stood up I got a sudden headache, dizziness, my vision went dark and felt like falling. What could have caused it?
This happens to me too. I really didn’t like it and it scared me badly. I developed a habit of being very deliberate and changing elevation slowly. Think about your moves before you make them. That was the only thing that worked for me. Also, if you start to feel that way again, stop moving, breath, and stay calm.
That sounds like low blood pressure. Electrolytes are key for a lot of things, including blood pressure.
I also find that not drinking caffeine helps tremendously with maintaining electrolytes and therefore blood pressure, but not everyone is ready to give up food and caffeine.
This happened to me after the gym. I had stars in my eyes lol. quick acting carbs resolved it for me too. Like others said move slower, especially when bending down standing up, getting up your chair etc.
Too much potassium could possibly be the cause depending on what your electrolyte ratios are. Potassium is assiocated with vasodilation (lowering blood pressure) while sodium will cause vasoconstriction (high blood pressure).
Sources:
Sodium [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770596/
Potassium [2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3362178/
Try raise the sodium more than the potassium, read the Electrolytes 101 guide on the subreddit it’s really useful information regarding the correct electrolyte ratios. If you’re already consuming the correct ratios of electrolytes then I apologies I’m just here to try help if I can. Personally I have 5500mg of Sodium from Himalayan Pink Salt, 3200mg of Potassium from Potassium Chloride, 400mg of Magnesium from Magnesium Citrate (Capsules) and 150mcg of Iodine from Potassium Iodine. I only supplement Iodine when I fast for several days because my salt isn’t iodized.
It could also be other issues, maybe low blood sugar because your body is adapting to ketones as a fuel source. Anyways I hoped that helped somewhat.