Several factors can cause the hands to swell when hiking, but the most common causes are gravity and how the body distributes heat during exercise. As the core muscles heat up when hiking, the vascular system cools the body by releasing more fluid to our fingers, hands, and feet. When blood reaches the skin to dissipate the heat, fluids leak out of the vessels, causing swelling of the limbs.
Medically known as exercise-induced peripheral edema, the problem is not serious and will disappear soon after you stop hiking.
On a recent backpacking trip in the California Marble Mountains, I noticed that the ring on my finger felt so tight that I could not remove it. My fingers and hands were visibly puffy and felt slightly numb. It was intensely hot, although I was drinking plenty of water and not consuming excess salt. Therefore, I knew that I was not suffering from dehydration or retaining fluids. Although disturbing, I wasn’t worried because this happened before, and my hands eventually shrank to normal.
When I got home, I researched the topic. It turns out that this condition is common. and it turns out that this condition is common.
Here are a few things you can do to prevent swelling while hiking.
Keeping your arms suspended long-term can cause blood to pool up in the extremities. Rapidly swinging your arms above your head in a circular motion will move blood from your hands and reduce swelling.
A less common cause of swelling in the hands is caused by low blood sodium concentration. This can occur if you drink too much fluid or water than your body can get rid of. Hyponatremia is more commonly associated with ultra-distance running than with backpacking or hiking. [1]
So, if you ever experience swelling or puffiness in your fingers or hands when hiking, chances are, all you need to do is to improve blood circulation to your hands.
Keep in mind that these suggestions may not prevent swollen hands if you suffer from a health condition. If the puffiness does not go away within a few hours after hiking, consult with a doctor.
Hew-Butler, T., Smith-Hale, V., & Sabou, J. (2019). Exercise-associated electrolyte disorders. Current Opinion In Endocrine And Metabolic Research, 9, 51-55. doi: 10.1016/j.coemr.2019.06.014
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I used a cane when hiking. The muscles in my hands are activated, thus increasing blood flow and preventing swelling of the hands.