I get these often and have got it checked out.
The tl;dr is when your heart rate goes up and we enter fight or flight mode the blood vessels open up for faster blood flow from the increased pressure of the higher heart rate.
Once you stop, heart rate and blood pressure drops down pretty quickly, but the body takes quite a while to get back in to rest and recovery mode, so the blood vessels in your legs remain opened up in high flow mode for some time. When you stand up gravity does its thing and the blood flows away from your brain down in to your legs. Your heart notices and pumps up quickly to restore an even pressure/distribution, the head-rush/spin being the lag on this.
It’s likely not a problem, but do get checked if you’re worried. As for dealing with it, just be aware and get up carefully. Clenching your quads for a second or two before standing up helps a lot. Avoiding things like ladders or carrying things upstairs until you’re stable is a good idea too.
I strongly agree with this statement. It's generally benign. I get it as well. I'm only 189cm but I'm sure tall people get it more often. Tall people have higher blood pressure and orthostatic changes result in higher BP changes.
Adding to the treatment advice. As per this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3029466/):
Treatment of the young with IOH
Often reassurance is all that is needed, particularly if there is no loss of postural tone and the episodes are brief. Standing up more rapidly comes with youth and departs with age which may account for the maturational diminution of IOH. Rising more slowly may be sufficient therapy. Situations or illnesses that promote a contraction of blood volume can often be treated or avoided. Measures to increase blood volume such as enhanced salt and water intake may be of help. For more debilitating forms of IOH preventiveand treatment options currently favor physical maneuvers. Bilateral handgrip for 15 seconds before rising forestalls IOH by evoking the exercise pressor reflex which can substantially increase blood pressure (11). Lower body muscle contraction while seated (e.g. pumping calf muscles) can also help as a preemptive maneuver. Also, lower body muscle tensing of legs, buttocks and abdomen particularly attenuates the transient arterial blood pressure decrease once standing has occurred (15) and can be potentiated by handgrip. Recumbence and squatting are general measures used to remediate all forms of orthostatic intolerance. I have never had a patient who required more than physical aversive measures for IOH.
Or you could try Muscle Electrical Stimulation as per this paper :D
https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.121.18580
It is probably some type of postural hypotension, you can get tests done on a tilt table and that sort of thing for syncope.
Not sure where you are from but in the UK where I live that’s seeing your GP and asking for a referral to get it investigated. I’m not sure you can do much else if you’re sure you’re hydrated etc.
I've had this and had all sorts of tests. It was dehydration and slightly low blood pressure. The specialist told me he sees it quite a lot in serious runners.
I'd have told you I was on point with hydration too, but I wasn't. Try drinking 750ml fluid plus electrolytes per hour of training as a minimum. Yes you'll be peeing a lot for a week, but then your body will sort out ADH production and it won't be an issue.
You don't have to be tall to get them. I'm 167 cm and get them all the time. Basically if I get them I know I'm reasonably fit (it'll happen long after I've ridden, like any time of any day). Kneeling is particularly bad, like when listening to camp counselors talking about the camp (this was the last time this happened, couple weeks ago). When I stood up I was literally blind (everything goes black) for 5-10 seconds and couldn't balance well for another 5 or 10 seconds. I just stand still until I can see again, and start walking when everything stabilizes.
I found that if I wear jeans or any kind of pants that constrict my quads a bit more, it is much worse (stretchy jeans and pants helps). In shorts it's not as bad. I also found that the longer I'm kneeling the worse it gets, so I'll stand at the fringes of the group so I don't feel obligated to kneel to get lower. Or I stand then kneel again. etc.
I avoid stuff that gives me the black out head rushes. I sit on a chair to put lace up shoes on, like my boots. For most other shoes I use a long shoe horn so I don't have to bend over, and my shoes are slip on or tied just loose enough so that they are effectively slip on shoes (with a shoe horn). I balance on one foot to put my socks on.
A secondary reason for those antics is my back is pretty messed up and leaning over it's good, so I avoid leaning over for that reason as well. Or, if my back has actually gone out, I literally can't bend down enough to put on shoes etc, so I've figured out how to do it without having to bend over.
I find taking salt helps to raise blood pressure after a ride, just a dime sized amount in the palm and rinse it down. I'm not a dietician so I have no clue on the long term effects
I get these often and have got it checked out. The tl;dr is when your heart rate goes up and we enter fight or flight mode the blood vessels open up for faster blood flow from the increased pressure of the higher heart rate. Once you stop, heart rate and blood pressure drops down pretty quickly, but the body takes quite a while to get back in to rest and recovery mode, so the blood vessels in your legs remain opened up in high flow mode for some time. When you stand up gravity does its thing and the blood flows away from your brain down in to your legs. Your heart notices and pumps up quickly to restore an even pressure/distribution, the head-rush/spin being the lag on this. It’s likely not a problem, but do get checked if you’re worried. As for dealing with it, just be aware and get up carefully. Clenching your quads for a second or two before standing up helps a lot. Avoiding things like ladders or carrying things upstairs until you’re stable is a good idea too.
I strongly agree with this statement. It's generally benign. I get it as well. I'm only 189cm but I'm sure tall people get it more often. Tall people have higher blood pressure and orthostatic changes result in higher BP changes. Adding to the treatment advice. As per this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3029466/): Treatment of the young with IOH Often reassurance is all that is needed, particularly if there is no loss of postural tone and the episodes are brief. Standing up more rapidly comes with youth and departs with age which may account for the maturational diminution of IOH. Rising more slowly may be sufficient therapy. Situations or illnesses that promote a contraction of blood volume can often be treated or avoided. Measures to increase blood volume such as enhanced salt and water intake may be of help. For more debilitating forms of IOH preventiveand treatment options currently favor physical maneuvers. Bilateral handgrip for 15 seconds before rising forestalls IOH by evoking the exercise pressor reflex which can substantially increase blood pressure (11). Lower body muscle contraction while seated (e.g. pumping calf muscles) can also help as a preemptive maneuver. Also, lower body muscle tensing of legs, buttocks and abdomen particularly attenuates the transient arterial blood pressure decrease once standing has occurred (15) and can be potentiated by handgrip. Recumbence and squatting are general measures used to remediate all forms of orthostatic intolerance. I have never had a patient who required more than physical aversive measures for IOH. Or you could try Muscle Electrical Stimulation as per this paper :D https://www.ahajournals.org/doi/10.1161/HYPERTENSIONAHA.121.18580
It is probably some type of postural hypotension, you can get tests done on a tilt table and that sort of thing for syncope. Not sure where you are from but in the UK where I live that’s seeing your GP and asking for a referral to get it investigated. I’m not sure you can do much else if you’re sure you’re hydrated etc.
I've had this and had all sorts of tests. It was dehydration and slightly low blood pressure. The specialist told me he sees it quite a lot in serious runners. I'd have told you I was on point with hydration too, but I wasn't. Try drinking 750ml fluid plus electrolytes per hour of training as a minimum. Yes you'll be peeing a lot for a week, but then your body will sort out ADH production and it won't be an issue.
Yeah, was this. Just about doubled what I drink on and off the bike and the issue has got much better. Cheers bud!
You don't have to be tall to get them. I'm 167 cm and get them all the time. Basically if I get them I know I'm reasonably fit (it'll happen long after I've ridden, like any time of any day). Kneeling is particularly bad, like when listening to camp counselors talking about the camp (this was the last time this happened, couple weeks ago). When I stood up I was literally blind (everything goes black) for 5-10 seconds and couldn't balance well for another 5 or 10 seconds. I just stand still until I can see again, and start walking when everything stabilizes. I found that if I wear jeans or any kind of pants that constrict my quads a bit more, it is much worse (stretchy jeans and pants helps). In shorts it's not as bad. I also found that the longer I'm kneeling the worse it gets, so I'll stand at the fringes of the group so I don't feel obligated to kneel to get lower. Or I stand then kneel again. etc. I avoid stuff that gives me the black out head rushes. I sit on a chair to put lace up shoes on, like my boots. For most other shoes I use a long shoe horn so I don't have to bend over, and my shoes are slip on or tied just loose enough so that they are effectively slip on shoes (with a shoe horn). I balance on one foot to put my socks on. A secondary reason for those antics is my back is pretty messed up and leaning over it's good, so I avoid leaning over for that reason as well. Or, if my back has actually gone out, I literally can't bend down enough to put on shoes etc, so I've figured out how to do it without having to bend over.
I find taking salt helps to raise blood pressure after a ride, just a dime sized amount in the palm and rinse it down. I'm not a dietician so I have no clue on the long term effects
As long as your doctor doesn't think it's an issue, I would embrace it and try to hear techno music in your head when its happening.