What is the “Right Dose” of Exercise for a Longer Life?

I recently stumbled across a blog post from April 2015 in which NY Times writer Gretchen Reynolds was discussing the “right dose” of exercise to increase longevity.  Her article was based on two new “impressively large-scale” studies that she thought would provide “clarity” on the topic.

It’s a principal of toxicology that “the dose makes the poison.” In other words, drugs that are beneficial in small does may be toxic if you take more than the prescribed amount.  For many people, exercise might as well be a toxic chemical: they want to know what is the minimum dose necessary to stay healthy.  Even better if they could take a pill and not have to break a sweat.


My attitude is different.  It seems sad to me that a natural activity like exercise would be “dosed” like a pharmaceutical.  And in any case, I’m skeptical about scientists who claim they can measure such things.

My faith in humanity was restored, however, when I read the post’s top-ranked comments:  readers had raised interesting questions about the studies’ logic, disputed the purpose of the article, and taken Reynolds to task for naivete.

In fact, after reflecting on the comments, I’ve concluded that the “right dose” of exercise is the maximum amount possible…

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What is the “Right Dose” of Exercise for a Longer Life?

Return to Point Lobos


I recently returned to Fort Ord for the first time in 30 years to participate in a trail race and arriving a day early, headed out for Point Lobos State Natural Reserve, which is located just south of Monterey along the northern California coast.  It’s one of the most beautiful spots I’ve ever encountered.

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Return to Point Lobos

Ordnance 100k Race Report: Going “Light”

A few weeks ago, I learned to my surprise that a trail race was going to take place at Fort Ord, California .  It would be almost exactly thirty years from the day in 1986 when I reported for duty as a young officer with the 7th Infantry Division (light).  Upon arrival at Fort Ord, I had briefly marveled at the coastal mountains of northern California and then quickly found myself crossing the beautiful, rugged terrain in runs, on road marches, and during tactical movements, learning a great deal about discipline and physical endurance as a member of the 7th infantry “light fighters.”

A lot had changed in thirty years.  After a brief stint in the army, I had moved on to a career in finance.  Meanwhile, the Army had deactivated the 7th Infantry Division, and Fort Ord had been transformed into a national park.

I couldn’t resist.  In due course, I was registered for The Ordnance 100-kilometer (61-mile) trail race, organized by Inside Trail.  It would be a chance to experience once again Fort Ord’s rocky canyons, emerald hills, and sandy trails, as well as reflect on the idea of “going light,” not only as a soldier, but now as a runner.

7th ID
7th Infantry Division (light)

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Ordnance 100k Race Report: Going “Light”

Accepting the Universe

john burroughs

In his prime, John Burroughs (1837-1921) was one of the most popular writers in America, with a huge following of readers and relationships with the likes of Theodore Roosevelt, Henry Ford, Thomas Edison, and railroad tycoon E. F. Harriman.  His passion was the birds, forests, rivers, and mountains of his native Catskills, and his writings reveal a scientist’s powers of observation and a nature-lover’s emotional connection to the land.  In 1919, at age 82 he appeared in a short film, shown leading a trio of young children around his Catskill farm.  He points out butterfly, chipmunk, grasshopper, and then the following words appear on the screen:

I am an old man now and have come to the summit of my years.  But in my heart is the joy of youth for I have learned that the essentials of life are near at hand and happiness is his who but opens his eyes to the beauty which lies before him.

Today, these words are remembered by a dedicated group of Burroughs enthusiasts.  But despite his enormous popularity, his hasn’t become a household name like other American naturalists such as Henry David Thoreau or John Muir.  I wondered, why?

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Accepting the Universe

Seeking “Flow”

A recent post on New York Magazine’s website gushed about ultra-marathoners who run in a state of “flow,” a term coined by psychologist Mihaly Csikszentmihalyi to describe the experience of people who are focused, productive, and happy.  According to the author, even casual runners recognize flow as “getting in the zone, cranking out your best stuff, and just being awesomely lost in a creative process.”  Endorphin-induced feelings of accomplishment, focus, and strength produce in the runner a “near-spiritual feeling of Zen and nirvana,” the author asserts.  The premise seems simple:  run, experience flow, and you’ll become happier and more productive.

But if you read Csikszentmihalyi’s work, you’ll find it’s not that easy.

Genuinely happy individuals are few and far between.

— Mihaly Csikszentmihalyi, Flow:  The Psychology of Optimal Experience

Mihaly Csikszentmihalyi.  Source:  Association for Psychological Science

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Seeking “Flow”

The Cry of the Anarcho-Primitivists

In short, all good things are wild and free.

— Henry David Thoreau, Excursions

As someone who enjoys running in the mountains, I find myself drawn to Henry David Thoreau’s vision of nature and wildness.   But when you follow in Thoreau’s path, you discover that his admirers include not only outdoors enthusiasts, but also people with more extreme views.  Consider the philosopher and writer John Zerzan, a self-proclaimed anarchist and primitivist, who criticizes industrial mass society as inherently oppressive and warns us that technology is leading humanity into an increasingly alienated existence, at the same time that it threatens to destroy the natural environment.  To be sure, the anarcho-primitivist movement counts few members, but does that mean it’s safe to ignore Zerzan and his warning?

Portrait of John Zerzan by Bata Nesah, Belgrade, 2013

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The Cry of the Anarcho-Primitivists