Here's something I must admit I've never considered: Are shorter arms and legs linked to an increased risk for Alzheimer's or other dementias?

Apparently, there's some research to back this up. A study just published in the journal Neurology found that women with shorter arm spans were 1.5 times more likely to develop Alzheimer's than women with longer arm spans. Long legs were also a plus for women, indicated by a 16% reduction in Alzheimer's risk for each additional inch of leg length beyond the average. While arm length affected Alzheimer's risk in men, leg length was not a significant factor.

This study supports three previous studies in Korea that linked shorter limbs with an increased risk for cognitive impairment. Why are researchers finding this link? They theorize that shorter limbs are often due to poor nutrition in early life, which can also affect brain development. If the brain doesn't develop properly in childhood, it might be more susceptible to brain disorders in adulthood.

I know what you're thinking: "My mom and dad are/were both short, so that's why I'm short! It wasn't because of poor nutrition." That's right, genetic factors play a significant role in our development, too. Luckily, the researchers acknowledge that. Still, I guess I have another reason to be happy about being six feet tall.

Suggested Reading:

• Risk Factors for Alzheimer's
• Alzheimer's Prevention Tips

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