|Photo by Martin Sharman.|
However, aging is correlated with an increasing number of bodily complaints.
Yet people don't all age at the same rate.
Genetics, environmental factors, access to affordable healthcare (provided by benefits, income and proximity), and lifestyle choices affect our aging process.
Well, and we can never completely outrun Father Time.
This week, I read a The Guardian's summary of a recent study that illustrates this variation:
At 38 years old, participants of the Dunedin Study Birth Cohort were found to demonstrate biological "ages" ranging from 28 to 61.
Why did the nearly thousand participants age at different rates?
Here are the 18 biomarkers used in the Dunedin Birth Cohort study. I'm using the labels from Figure 3 of the research publication itself.
- Cardiorespiratory fitness (VO2Max)
- Waist:Hip Ratio
- Mean arterial pressure
- Leukocyte telomere length
- Creatinine clearance
- Urea Nitrogen
- Gum Health
- Total cholesterol
- White blood cell count
- hs CRP
- HDL cholesterol
Before I started my graduate program in gerontology, I could recognize and explain maybe six of these biomarkers at best. Now I know more about another six. I will need to research the most obscure six.
These 18 biomarkers were employed by Daniel H. Belsky, et al (of Duke University School of Medicine) and published online in June 2015 by the Proceedings of National Academy of Sciences of the United States of America. Abstract.
Remember, there is a more accessible summary by The Guardian.
When I read about the physical side of aging, I frequently encounter research about various biomarkers of longevity and health. Because I want to focus on controllable factors, I look through my magnifying glass at biomarkers that can be modified through lifestyle choices.
I ask myself daily, "What am I doing today for my octogenarian self?"
[Note: This post's purpose is to raise awareness. This is not medical advice. Please consult with a licensed medical professional in order to better manage your health with preventative care and/or curative care.]
Depending on our education level, income and social status, we may be able to exert a lot of control over our diet, exercise, tobacco use, alcohol consumption, proper use of prescription medications (and rejection of street drugs), exposure to pollutants, effective stress management (and overall good emotional health), and beneficial social engagement.
The American Federation of Aging Research has a very short guide to the Biomarkers of Aging. They explain that scientists are still trying to pin down what measurable physical attributes can help them predict the aging process. Here is a key quote from their this publication:
"Simply put, biomarkers need to be simple and inexpensive to use. They should cause little or no pain and stress. And they must measure aging accurately."
Ah, "measure aging accurately." That's constantly being debated, and the proliferation of tests and studies will only extend the debate. Because there isn't a set list of biomarkers, it's a bit foolish for me to enumerate them. And these biomarkers can be really technical.
Before concluding, let me contextualize my interest in biomarkers.
In the years since becoming a gerontologist, I have taken a variety of stances towards aging.
I cycle through these approaches: being stressed out, researching voraciously, obsessing over minutiae of diet and exercise, hanging out with my doctor (GP) and other medical professionals in an effort to prevent and treat emerging issues, distracting myself with life's pleasures (the beneficial-to-least-harmful pleasures), and seeking emotional-spiritual acceptance.
If I were limited to only one approach to aging, I must concede that I am best served when I take a spiritual approach to accepting the aging process as inevitable but living purposefully with each day that I'm granted life.
Waist:Hip Ratio: A Biomarker for Longevity and Health
Books on Aging and Spiritual Growth
Leisure World Cohort Turns 90
Walking Rate Correlates with Longevity