Tag Archives: couch potato

Drugged Up

Even in the era of Lipitor, lifestyle matters more than we realize.

Sean Lo furrows his brow as he tries to make sense of the cocktail of medication he is about to take. On his table lie oblong pills of pink and white, round tablets of gray, and little discs colored like olives. Inside each hermetically-sealed capsule lies a precisely measured, bioactive ingredient: 4mg of doxazosin, for his high blood pressure; 90mg of Cardizem, to treat angina; and 20mg of sennosides, used as a powerful laxative. These drugs are every bit as potent as they are difficult to pronounce, and knowing which ones are safe to take can be more of a black art than a medical science. In the last year, Lo has had his drug regimen changed three times by three separate physicians, each time without explanation. The only medication he could recognize today was a pouch of pills containing nitroglycerin. This was a precursor for making dynamite, that much he knew. What he couldn’t figure out was how an explosive could help his heart problems.

These drugs—over ten of them lie scattered on Lo’s desk—represent the triumphs of modern medicine. They have kept Lo alive for over three decades, the time since he first suffered from a cardiac arrest. Now at the age of 83, he has far-outlived his ancestors, who could not grasp the concept of a heart attack, much less treat one. Yet Lo has been far from well: apart from keeping him alive, the pills have done little to improve his overall health. In addition to hypertension, Lo has been troubled by new conditions like constipation, fatigue, and insomnia. His physicians responded by doubling his medication and prescribing a new set of muscle relaxants designed to relieve his general malaise. They calmly reassured him that the new formulation was safe to take—only, it wasn’t. For the next three days, Lo—my grandfather—stumbled around the house in an exhausted stupor, spending half the week collapsed in bed.

Side effects may come and go, but trust, once broken, is hard to rebuild. For patients like my grandfather, disillusionment may eventually set in. This can become dangerous if a desperate patient turns to quackery when he instead needs real medical treatment. Snake oil salesmen, however, will continue to flourish until modern medicine fixes its deficiencies. One such shortcoming is the tendency for doctors and patients alike to solve serious ailments through quick fixes in the form of a pill. All too often, a patient’s first reflex to suffering is to reach for more drugs. Patients with high cholesterol often take one of dozens of statin drugs such as Lipitor, Crestor, and Zocor. Out of instinct, they reach for histamine antagonists like Zantac or proton-pump inhibitors like Prilosec whenever he suffers from heartburn. Sleeping meds like Ambien may lead to addiction, but doctors prescribe them to insomniacs anyway because fixing poor sleeping habits is too much work. Building lasting health and wellness is simply not worth the trouble when high-tech treatments are available.

This reliance on chemical expedients is one reason Americans are not living to their full potential. This year, the pharmaceutical industry is expected to generate almost $900 billion dollars in revenue worldwide, almost half of which will come from the United States alone (1). It is not uncommon in the US for a patient to spend over $1500 per year on prescription drugs alone. Our life expectancy, however, has only improved marginally considering how much we spend. Globally, the USA ranks at #50 (78.37 years), only slightly ahead of Cuba (#57 with 77.70 years), and even behind a few impoverished nations like Bosnia and Jordan (#45 with 78.81 years, and #29 with 80.05 years, respectively. 2). Some officials are even worried that life expectancy will slide backwards in the coming decades, from around 78 years today to less than 75 (3). Today’s newborn infants might die younger than their parents.

The fault lies with the drugs themselves. Rather than curing the disease, most drugs merely treat symptoms. A pill can provide immediate relief and remove imminent danger, but it must be taken daily remain effective. By itself, it cannot remove the underlying cause of illness. Eventually, large doses of medicine can cause irreversible damage to vital organs. I witnessed this first-hand with my grandmother, who as a diabetic had to take a multitude of drugs. Eventually, this poisoned her liver; she died, in part, due to hepatitis complications.

A more permanent solution requires a hard look at lifestyle rather than drugs. For my family, the health culprits are painfully obvious. Most of my extended family members live unhealthy, Westernized lifestyles, from my father-in-law who returned from heart surgery this year, to my mother who is fighting high-cholesterol, to my father who was recently diagnosed with hypertension. The recurring patterns are unmistakable: junk-food diets, couch-potato habits, high-stress jobs, and not enough rest. When I paid a visit to my grandfather, I saw the same tell-tale signs. His meals often consisted of candies, processed meat, and greasy take-out; fresh fruits and vegetables are virtually ignored. I once left him a bag of brown rice, hoping the extra dietary fiber would help with his constipation. When I returned two months later, I found the bag untouched. “It’s too rough,” he told me, before helping himself to a second portion of dessert. After dinner, he spent the next four hours watching TV.


Should we measure a person's health in push-ups and mile runs?

Not everything stems from lifestyle. Old age, genetics, and pathogens can bring illnesses that even fruits, veggies, and exercise cannot cure. For many common illnesses, however, lifestyle can make a tremendous difference. Heart disease, diabetes, breast cancer, colon cancer, prostate cancer, and Alzheimer’s disease are just a few of the dozens of illnesses linked to a high-stress, consumer lifestyle. Even patients who do not directly suffering from Western illnesses could certainly benefit from a healthier way of living. My grandfather, certainly, would have aged better with less sugary desserts.

Most of us would benefit tremendously from simple lifestyle changes. A more wholesome, simpler life—one without fast food, traffic jams, and television shows—is the proverbial ounce of prevention, worth pounds in high-tech cures. It is far better to prevent a disease early than to react to one after it becomes expensive and life-threatening. A decades-long habit of eating a whole-foods, plant-based diet could prevent the agony and expense of chemotherapy. Perhaps an hour-long, daily bicycle commute could prevent the onset of colon cancer, and perhaps a good night’s sleep could stave off the flu (while saving electricity, too).

Most of all, what is needed is a more holistic approach towards health. Quality of health—feeling good as opposed to feeling sick—matters just as much as a long lifespan. Until a person can wake up each morning without feeling tired, he is not healthy. Until he can climb up a flight of stairs unassisted, do a hundred jumping jacks, and jog for a mile each morning, he is not healthy. Crossing the street should not cause shortness of breath. Day-to-day tasks should not require constant medical intervention, whether that’s in the form of drugs, hospital visits, or surgery. And so the elusive quest for true health often ends up, not in a scientist’s lab of modern elixirs, but with a brisk morning walk and the spinach served on a dinner plate.


  1. Activery forecasts global revenue to be $897 billion for 2011; Wikipedia reports that 2006 revenue was $643 billion.
  2. The USA ranks #50 according to the CIA World Factbook’s data on life expectancies.
  3. Obesity is lowering our life expectancy according to epidemiology professor S. Jay Olansky.
  4. Photo credits: Greg I. Hamilton, Official U.S. Navy Imagery, CC BY.

Human Power: That Other Renewable

Bike-powered peanut sheller and blender

Of all the renewable energy sources available today, one of them is constantly overlooked by modern society. It’s a shame, because this renewable energy is easy to harness, uses little space, and is complementary to wind and solar energy. I am speaking about that other, forgotten renewable: human power.

Using machines like a hand-crank, treadle, or pedal, human labor can be harnessed as mechanical or electrical work. The most common human-powered machine is the bicycle: mechanical work from a pedal is used to turn a wheel, which propels the rider forward. Bicycles, however, are not the only possible human-powered machines. With some clever engineering, human power has been harnessed to crank washing machines, plow fields, and saw wood. A bicycle can even generate electricity if equipped with a generator, voltage regulator, and battery. It can then power light bulbs, flashlights, laptops, and vacuum cleaners.

Hand-cranked and solar flashlight and radio


Hand-cranked red pepper processor

Unlike other renewable energy sources, human power requires active labor. Modern society, with its distaste for exercise in general, rejected human-powered machines for this very reason. That’s a shame, because human-power provides a nice complement to solar technology. Pedal-power can provide a handy back-up to photovoltaic panels on cloudy days. What’s more, pedal power can create short bursts of electricity, in contrast to the steady-stream of low power provided by solar panels.

An illustration involving an LCD monitor can provide perspective. A typical monitor requires around 100W of power to operate. After cloud cover and the earth’s tilt are considered, a photovoltaic panel might produce a power of around 25W/m^2 on average (1). So to power the monitor, we would need 4m^2 of solar panels. It only takes a single stationary bicycle, however, to generate 100W. Space is only needed for the bicycle itself and a few electronics, so the whole system can be contained in around one square meter. A fit cyclist, moreover, can produce even higher rates of sustained power — up to 200W in athletes. As a result, a well-trained cyclist can produce twice the energy of a photovoltaic panel in one-fourth of the space.

Pedal-power is not unreasonably expensive. A stationary unicycle can be built for under $250, and accompanying electronics can be purchased for around $400 (2). The combined total is $650, roughly the cost of similar solar panel installations.

The real cost savings, however, are for appliances that require only mechanical power. When there is no need to purchase expensive electronics, pedal power is clearly cheaper, since these machines can be built using only donated bicycles, spare hardware, and elbow grease. One NGO based in Guatemala, Maya Pedal, has taken discarded bikes and retrofitted them to make useful tools for local farmers. Old bicycles have been used to blend soap, pump water, grind flour, shell peanuts, and thresh grain. Not only has this removed the drudgery of agricultural work, it has also increased the income of local families. These projects promote development without burning extra gasoline or coal, all while recycling old garbage.

The Western world could learn a lesson. We chronically suffer from energy shortages, and we have no lack of people needing exercise. In the United States, more than one in four Americans are obese, and six in ten overweight. Cheap energy has allowed us to live sedentary lifestyles, which shorten our lifespans and waste trillions of dollars on unnecessary healthcare. If couch potatoes were forced to pedal for their television time, the rates of Western diseases — heart attacks, strokes, diabetes, and cancers — would rapidly plummet.

This is much better than going to the gym. Not only does gym membership cost thousands of dollars, but workout machines like treadmills actually waste additional energy to power. The average treadmill consumes 1500W of power — enough power to run 20 laptops. When people drive to the gym, moreover, they further add to greenhouse gas emissions. With human-power, they could instead burn their extra fat for productive purposes. Those calories might as well be used to wash clothes, blend smoothies, and generate electricity. Why not combat global warming while getting in shape?

Pedal-powered washing machine


Whether human power can truly make a difference depends on the efficiency of the exercise machine and the power demanded by your household. The average person can produce around 35-60W of power using a hand-crank, and 100W-120W using pedal power. Cell phones, flashlights, and watches can all be powered by hand-crank, while computers and televisions can be powered by pedals.

This sounds promising — that is, until you consider our monstrous demand for power. A medium-sized, window air conditioner uses around 1000W of power. To supply the energy for just that one AC unit, it would take a team of ten cyclists pedaling at full speed for the entire day. Once you add in laptops, televisions, clothes driers, washing machines, heaters, and light bulbs, human power becomes woefully inadequate. It would take a legion of cyclists to support the typical American home.

Storing generated electricity is a problem as well. Most pedal generators use lead-acid batteries, which store energy for later use. Devices can then be plugged into the battery rather than directly to the exercise machine. This helps avoid the awkward situation of having to simultaneously pedal while using your laptop. But as Low Tech Magazine points out, lead-acid batteries require massive amounts of energy to manufacture. Sulfuric acid can also cause severe burns, and lead can cause birth defects and brain disorders. Even pedal-powered electricity, then, isn’t perfectly green.

This limitation can be largely overcome by simply transmitting work mechanically rather than electrically. One clever hobbyist retrofitted his bicycle to spin washing machines using only pulleys and belts. The Human Powered Home, a compendium of do-it-yourself pedal-powered machines, provides plans for mechanically connect your bicycle to a grain mill, sewing machine, and tool sharpener. With a little ingenuity, the mechanical applications of pedal power are endless.

Pedal-powered jig saw


Despite its flaws, human-powered electricity can still contribute to sustainable living. Every renewable technology has its limitations, and a human-powered generator is no exception. They may not be perfectly green, but neither are solar panels. When used properly, the benefits of renewable, off-grid electricity can outweigh the harm caused by pedal-power electronics.

Generating your own electricity can allow you to live off the land, which dramatically reduces your carbon emissions. One difficulty with living on rural, undeveloped land is the lack of grid electricity. Pedal power, along with photovoltaic panels, can provide electricity without an expensive connection to the utility company. One Laptop Per Child, for instance, has taken advantage of human power to design off-grid laptops. Students in remote villages often lack access to electricity, but one minute on a hand-crank can provide enough energy for ten minutes of laptop use.

Yet the most profound impact of human power is not the generated electricity itself, but rather the conservation ethic it instills. Producing electricity is hard work. When we hook up an appliance to a power outlet, we are blind as to how much energy we are truly wasting. But if we had to pedal forty-five minutes for each hour of television we watched, we would be more conscious about our electricity usage. We would never have to be reminded to turn off our lights or to sleep our computers, and few would dream of using an air conditioner. Ultimately, it’s conservation — in addition to our feet — that will provide us with the power to lower our carbon footprint.


Do-it-yourself bicycle-power plans are the most affordable and have the lowest environmental impact. There are also some commercially-available attachments. They are expensive, however, and may actually waste more energy than they produce. I encourage you to build your own instead.

  1. Sustainability: Energy: Without the Hot Air generously estimates that a solar panel in Britain produces around 22W/m^2 on average. Low-Tech Magazine estimates a power capacity of 100-150W for average cyclists and up to 300W for athletes.
  2. The Pedal Powered Prime Mover is one unicycle designed especially for pedal power. It costs around $100-$250. The exact electronics will vary depending on your needs.
  3. Photo credits: Alan Levine, CC BY. Engineering for Change, CC BY. AIDG, CC BY-NC-SA. AIDG, CC BY-NC-SA. Donkeycart, CC BY-NC. Bruce Turner, CC BY.