Slight light-headedness when standing up. Am I doing something wrong?

[Xavaneptus]

I'm eating 170g or more of protein and 70g of fat daily as I try to lose weight. This afternoon I went cycling (16 km) and now, two hours late, I've gotten SLIGHTLY light-headed when getting up from my chair, twice. I sure hope I'm not doing something wrong. I also take a multivitamin daily and I'm confident I drink enough water. I've been doing this routing for 17 days now. I'm currently at 103 kg, 30 years old.

I've read there could be irregularities in blood pressure from the body still adapting to exercise, though this hasn't happened before. I've also read there could be issues with hormonal responses, but I'm supposedly eating enough fat to keep the hormonal system working properly. Then again, I did push myself today to increase my average speed.

It could just be a one-day fluke, but I wanted to ask just in case.

[Vrykul]

Isn't this a normal thing? I've had it since i was a kid and i was always skinny

If it's really bad, could be POTS (postural orthostatic tachychardia syndrome)

Basically your blood pressure doesn't rise enough to accomodate the sudden change in posture, so your heart has to pump really hard for a few seconds to make up for it

Afaik its not entirely understood but there are theories about it, i read a magnesium deficiency can cause it

[Xavaneptus]

Isn't this a normal thing? I've had it since i was a kid and i was always skinny

If it's really bad, could be POTS (postural orthostatic tachychardia syndrome)

Basically your blood pressure doesn't rise enough to accomodate the sudden change in posture, so your heart has to pump really hard for a few seconds to make up for it

Afaik its not entirely understood but there are theories about it, i read a magnesium deficiency can cause it

This doesn't really happen to me, it's why it gave me pause.

[Vrykul]

This doesn't really happen to me, it's why it gave me pause.

Maybe you didnt sleep well or something, there could be a million reasons

Stop overthinking it

[CommitmentRulz]

OP, height? How many calories a day are you eating? Consistently?

[Xavaneptus]

Maybe you didnt sleep well or something, there could be a million reasons

Stop overthinking it

This is likely. I just wanted to be sure it wasn't some known symptom of doing something badly.

OP, height? How many calories a day are you eating? Consistently?

174 cm, around 1400-1500 cal daily, very consistently. No carbs, minimum necessary fat and the rest in protein.

[Heisman2]

Probably a lack of sodium and you're sweating more if it out with the cardio. Feel free to lie down for 5 minutes, check your heart rate while lying down, then stand up for 1 minute and check your heart rate while standing. If it goes up by 20 that's almost certainly the answer. Try to get your blood pressure checked somewhere (can be a Walmart); if it's under 120/80 you may benefit from more salt chronically if this becomes a more regular issue. Regardless you can try to eat more salt for a week or so and see if you feel better. If that doesn't help then see a doctor.

[Xavaneptus]

Probably a lack of sodium and you're sweating more if it out with the cardio. Feel free to lie down for 5 minutes, check your heart rate while lying down, then stand up for 1 minute and check your heart rate while standing. If it goes up by 20 that's almost certainly the answer. Try to get your blood pressure checked somewhere (can be a Walmart); if it's under 120/80 you may benefit from more salt chronically if this becomes a more regular issue. Regardless you can try to eat more salt for a week or so and see if you feel better. If that doesn't help then see a doctor.

I doubt it's sodium, I'm adding a lot of salt to my chicken breasts & avocados. I was actually thinking on cutting it down since I suspect I'm retaining too much water. I will check my blood pressure anyway, though, thanks for the advice.

[Vampirelol]

This is likely. I just wanted to be sure it wasn't some known symptom of doing something badly.


174 cm, around 1400-1500 cal daily, very consistently. No carbs, minimum necessary fat and the rest in protein.

here's the problem. starving yourself and eating no carbs. enjoy trashing your body

[Xavaneptus]

here's the problem. starving yourself and eating no carbs. enjoy trashing your body

I'm not losing any muscle mass and I actually have trouble consuming that much protein. I don't think I'm starving.

[boo99]

174 cm, around 1400-1500 cal daily, very consistently. No carbs, minimum necessary fat and the rest in protein.

So 17 days of no carbs and 1400 and feeling light headed?

Hmm I wonder what could be likely causing it

[snailsrus]

So 17 days of no carbs and 1400 and feeling light headed?

Hmm I wonder what could be likely causing it

low blood sugar and lack of fuel for cardio

Op in 17 days you won’t see over night muscle loss, but it’s happening, there most likely is protein in your urine from breaking down body tissue for fuel. Up your calories, I weigh half of you and cut at a higher calorie amount

[boo99]

low blood sugar and lack of fuel for cardio

Yes, of course, I was being sarcastic lol

[Mrpb]

174 cm, around 1400-1500 cal daily, very consistently. No carbs, minimum necessary fat and the rest in protein.

This is not a good diet. If you want to do keto (no carbs) you need to eat more fat. Raise calories to 2000 for starters.

Your calorie deficit is too large, especially if you do that much exercise and cardio.

[snailsrus]

Yes, of course, I was being sarcastic lol

haha I figured I don’t think any human, even resting should be under 1500 unless dying at 90 in a hospital immovable

[faithbrah]

174 cm, around 1400-1500 cal daily, very consistently. No carbs, minimum necessary fat and the rest in protein.

found the culprit, case closed

for real though, it seems like way too many beginners get on these weird diets with minimum fat and zero carbs because "well i read from somewhere that carbs and fats make you fat sooo..."

[Xavaneptus]

This is not a good diet. If you want to do keto (no carbs) you need to eat more fat. Raise calories to 2000 for starters.

Your calorie deficit is too large, especially if you do that much exercise and cardio.

Isn't that just, more effective? If I'm burning energy from fat, do I need energy from carbs? Forgive the presumed ignorance, but I'm not generally feeling weak or lacking in energy.Are carbs needed for more than energy?

found the culprit, case closed

for real though, it seems like way too many beginners get on these weird diets with minimum fat and zero carbs because "well i read from somewhere that carbs and fats make you fat sooo..."

I read in the stickies of this forum about the minimum necessary grams of fat (0.4 * ideal weight in lbs). I didn't find any claim that there's a minimum necessary amount of carbs. I took my main info from showthread.php?t=173439001 (can't post links yet).

[CommitmentRulz]

Isn't that just, more effective? If I'm burning energy from fat, do I need energy from carbs? Forgive the presumed ignorance, but I'm not generally feeling weak or lacking in energy..

And yet complaining about being lightheaded when you stand up...

[Xavaneptus]

And yet complaining about being lightheaded when you stand up...

Well, it hasn't happened since. I ate a bit of pasta today, just in case, and I'm preparing to start eating oatmeal. I am interested in this matter, if there's information available. Is there any health consequence of not eating enough carbohydrates?

[air2fakie]

Is there any health consequence of not eating enough carbohydrates?

Light-headedness for one - but this is a circular conversation. Add a little salt to your food to replenish sodium lost and that should help it from happening again.

[dc3119]

I get lightheaded when I stand up from a squatting position on the ground. A few of my friends do too, so I always figured it was just normal, although I feel like it's getting worse as I get older. I could be imagining things though...

[AdamWW]

It’s the demons leaving your body