Experiencing swollen fingers or hands while walking or running is a relatively common issue.
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1.
Arm Motion
Movement of your arms while walking or running may be to blame for finger or hand swelling.
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Fluid Imbalance
When you exercise (especially in warm environments), your muscles emit heat.
Your body responds to this temperature elevation by increasing blood flow to the vessels near your skin.
Your body will then begin to sweat to cool off.
Some people are unable to efficiently regulate their internal temperature by sweating.
In these cases, the individual may notice fluid buildup in areas like their hands or fingers.
Dehydration can also cause swelling in these areas as your body retains water to counter the fluid imbalance.
This condition, also known ashyponatremia, is most prevalent in endurance athletes like ultramarathon runners and triathletes.
Metabolic Changes
When you exercise, certain metabolic changes occur to meet the higher energy demands on your body.
This ensures these structures have the oxygen needed to function at a higher level.
This is another theorized reason that postexercise fluid buildup may occur in the hands.
Ways to Reduce Exercise-Related Swelling
The evidence for reducing postexercise finger swelling is currently very limited.
Summary
Postexercise hand and finger swelling is a relatively common condition that is not completely understood.
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