Published on: 3/17/2025
When you get up after lying down, your body may have trouble adjusting its balance and blood flow, which can make walking feel shaky.
When you lie down for a while, your body gets used to being still, and your systems for balance and blood flow adjust to that position. Your inner ear and brain work together in the vestibular system to help you keep your balance. When you stand up, this system has to quickly adjust to handle gravity, and sometimes it can take a moment to catch up. This delay can lead to a feeling of unsteadiness or trouble walking. With that, your blood pressure might drop suddenly when you moving from lying down or sitting to standing, a condition known as orthostatic hypotension. This drop means your brain gets less blood flow right away, which can make you feel lightheaded. Some people, especially older adults or people taking certain medications, may experience these effects more intensely. Lying or sitting for a long time can also temporarily restrict blood flow to the legs. You may experience discomfort or a sensation of pins and needles in the legs as blood flow returns to the muscles and nerves. Taking your time when getting up and doing gentle stretches can help your body transition more smoothly from lying down to walking.
(References)
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Remaud A, Thuong-Cong C, Bilodeau M. Age-Related Changes in Dynamic Postural Control and Attentional Demands are Minimally Affected by Local Muscle Fatigue. Front Aging Neurosci. 2016 Jan 21;7:257. doi: 10.3389/fnagi.2015.00257. PMID: 26834626; PMCID: PMC4720785.
Wieling W, Kaufmann H, Claydon VE, van Wijnen VK, Harms MPM, Juraschek SP, Thijs RD. Diagnosis and treatment of orthostatic hypotension. Lancet Neurol. 2022 Aug;21(8):735-746. doi: 10.1016/S1474-4422(22)00169-7. PMID: 35841911; PMCID: PMC10024337.
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