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RESPOND TO THIS DICUSSION POST: Blood flow becomes a lot slower in people who stand still for long periods of time, such as pregnant women, cadets, army recruits, and marching band members, because their leg muscles aren’t working to pump blood back to the heart. Normally, when we walk or move, our muscles squeeze the veins and keep blood flowing. As for pregnant women, because the circulatory system has to work a bit harder, they are at risk of developing those varicose veins. In fact, the amount of blood increases from about 30 to 50 percent during pregnancy (Hines, 2024). This puts more strain on the veins and the legs, causing them to expand. The progesterone hormone also increases, which causes the vein walls to be more relaxed. In addition to making room for the additional blood, this impairs the veins’ ability to return blood to the heart (i.e., venous return), which causes swelling and pooling. The uterus presses against the inferior vena cava, the major vein that returns blood from the lower body to the heart, as the baby grows. Varicose veins may result from this pressure’s slowing of blood return, which causes it to back up in the veins of the legs. Additionally, veins include flaps (i.e., venous valves) that stop blood from flowing backward, but because of hormonal changes and elevated pressure during pregnancy, these flaps may not function as well, which leads to additional blood pooling (G Varvarousi et al., 2024). As for the cadets, army recruits, and marching band members, if they remain stationary for long periods of time blood pools in the veins because of gravity. This also increases venous pressure as well. Both parties are at risk of fainting because of that circulation deficit. Standing still can cause our leg muscles to not work properly, which is important for pumping blood back to the heart. Blood can pool in the veins of the legs without it, decreasing the volume of blood that returns to the heart and causing lightheadedness or fainting. Because our autonomic nervous system cannot keep up, standing for extended periods of time can also result in orthostatic hypotension, a big drop in blood pressure. Heat can make things worse by dilating the blood vessels, which reduces blood pressure and raises the risk of fainting, even when temperature is not the primary problem (Tortora, 2023). Some action(s) that these individuals might take to prevent, minimize, or alleviate the condition first is movement. This is to keep the blood circulating, thus promoting that venous return. If they need to stay still for a long time, I’d recommend moving their weight, contracting your calf muscles, or even marching in place. Pregnant women and anyone else who spends a lot of time on their feet might benefit greatly from compression socks, which keep that constant pressure on veins. This is to reduce swelling and improve the flow of blood back to the heart. To help with leg swelling during my long shifts as a nursing student, I wear compression socks, which help the circulation in my legs. Furthermore, staying hydrated is needed. Drinking water lessens the risk of fainting and helps keep normal blood pressure. Those who have to stand for long periods of time or who are pregnant should, if at all possible, take pauses to sit down or walk around. Comfortable shoes can also increase circulation. All in all, doing all of these things can lower the risk of fainting and varicose veins. References G Varvarousi, et al. “Agenesis of Inferior Vena Cava in Pregnancy: A Case Report and Narrative Review.” European Journal of Obstetrics & Gynecology and Reproductive Biology, vol. 299, 27 May 2024, pp. 22-25, www.ejog.org/article/S0301-2115(24)00260-4/abstract, https://doi.org/10.1016/j.ejogrb.2024.05.030. Accessed 8 Mar. 2025. Hines, Alina. “Understanding the Mechanisms Behind Increased Plasma Volume during Pregnancy | ShunChild.” Shunchild.com, 8 Mar. 2024, shunchild.com/article/why-does-plasma-volumn-increase-during-pregnancy. Tortora, G. J., & Derrickson, B. H. (2023). Principles of anatomy & physiology (16th ed.). Wiley.
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