At some point during the Eisenhower administration, a public health official looked at the American suburbs, the American automobile, the American television set, and the American frozen dinner, and reached a conclusion that felt inevitable: the human body was being retired. Not dramatically. Not all at once. But gradually, inexorably, the nation was evolving toward a future in which legs were vestigial, walking was a quaint historical practice, and the species would achieve its final form — supine, remote in hand, waiting for something to be delivered.
That prediction has been updated, reissued, and re-alarmed approximately every ten years since, absorbing each new sedentary technology into its framework with the enthusiasm of a theory that refuses to be falsified. The Americans, for their part, responded to each prophecy of physical collapse by inventing a new fitness craze, purchasing the necessary equipment, using it for three weeks, and then hanging laundry on it. This is not exactly the prophets' vision of vigor, but it is also not the species lying down permanently.
Welcome to six decades of confident predictions about the end of human locomotion, none of which have quite panned out.
The Automobile and the Death of the Foot (1950s)
The postwar suburban expansion gave the first generation of sedentary-collapse prophets everything they needed. The car was everywhere. The suburb was designed around the car. The grocery store was a twelve-minute drive. The school was a bus ride. The office was a commute. Walking, in this new geography, was not just inconvenient — it was architecturally impossible in many zip codes.
Physicians and urban planners of the era began documenting what they called 'hypokinetic disease' — illness caused by insufficient movement. President Eisenhower, who had survived a heart attack in 1955, became an unlikely avatar for the fitness-concerned establishment, and the President's Council on Youth Fitness was established in 1956 with the specific concern that American children were becoming dangerously soft compared to their European counterparts.
The prophecy at this stage was relatively measured: Americans were getting less active, and this trend, if unchecked, would produce a health catastrophe. The unchecked part was doing a lot of work in that sentence.
The Remote Control and the Escalator (1960s-1970s)
By the 1960s, the sedentary prophecy had acquired new evidence. The television remote control — a device that eliminated the extraordinary exertion of walking across a room — was identified as a meaningful contributor to physical decline. Escalators and moving sidewalks in airports were enabling humans to avoid the strenuous activity of ambulation on flat surfaces. Riding lawn mowers replaced push mowers. Electric can openers replaced manual ones.
Each labor-saving device was documented by someone, somewhere, as another step toward the horizontal endpoint. A 1968 report on American physical fitness noted with genuine alarm that the average American's daily caloric expenditure through movement had declined measurably over the previous twenty years.
America's response to this alarm was to invent jogging.
This requires a moment. In the late 1960s and through the 1970s, Americans — the same Americans who were supposedly evolving away from locomotion — spontaneously began running through their neighborhoods for no reason except to do it. Not to catch anything. Not to escape anything. Just running. For fun, or something adjacent to fun. Jim Fixx wrote The Complete Book of Running in 1977. It sold over a million copies. The jogging boom was real, it was large, and it was not in any of the sedentary-collapse models.
The prophets recalibrated and kept going.
The Aerobics Interlude and the Cable TV Complication (1980s)
The 1980s presented the sedentary-collapse theorists with a genuinely confusing decade. On one hand, cable television had arrived, multiplying viewing options and extending the hours Americans spent on their couches. Video games were entering homes. The VCR meant that movies no longer required the physical act of going to a theater.
On the other hand: Jane Fonda. Richard Simmons. The Jazzercise empire. Aerobics studios in every strip mall. The Nautilus machine. The Lifecycle stationary bike. A fitness industry that grew from a niche concern to a mainstream cultural force with remarkable speed.
The 1980s were, simultaneously, the decade in which Americans got more sedentary and the decade in which Americans became obsessed with exercise. Both things were true. The prophets had not modeled for both things being true at once.
What they also had not modeled was that the fitness craze and the sedentary trend could exist in the same person — the individual who watched three hours of television and then did a forty-five minute aerobics tape, whose net activity level was genuinely ambiguous.
The Internet, the Desk Job, and the Apocalypse That Kept Not Arriving (1990s-2000s)
The 1990s brought the desk job to its fullest expression. The knowledge economy meant that a substantial and growing portion of the American workforce now spent eight hours per day seated in front of a computer screen, then drove home, then watched television. The phrase 'sitting is the new smoking' had not yet been coined, but the conceptual groundwork was being laid.
By the mid-2000s, obesity rates had genuinely risen — not the apocalyptic physical collapse the prophets had envisioned, but a real and significant public health trend. The prophets felt, understandably, somewhat vindicated. They pointed at the data. The data pointed back.
And then Americans invented the 10,000-steps movement, bought pedometers in the millions, and started walking around their offices for no reason except that a small device on their wrist was judging them. The Fitbit launched in 2009. By 2015, wearable fitness trackers were a multi-billion dollar industry built entirely around the premise that Americans desperately wanted to be told how little they were moving so they could feel bad about it and occasionally do something different.
The Smartphone Endgame (2010s-Present)
The smartphone was supposed to be the final chapter. Here, at last, was the device that would complete the prophesied transition. Navigation apps eliminated the need to walk around finding things. Delivery apps eliminated the need to go to restaurants. Streaming services eliminated the need to go to video stores, which had already eliminated the need to go to movie theaters, which had already eliminated... you see the pattern.
The screens followed Americans into their pockets, and the sitting-is-the-new-smoking alarm reached full volume. Physician groups issued guidelines. Governments ran public health campaigns. Everyone agreed that this time, the sedentary apocalypse was genuinely imminent.
Americans responded by inventing Peloton, downloading Couch to 5K apps, joining CrossFit, popularizing hiking as a lifestyle aesthetic, and spending considerable money on standing desks that they use in a seated position.
The Accounting
Six decades of sedentary-collapse prophecy have produced the following: Americans are, genuinely, less active than they were in 1950. Obesity rates are higher. Cardiovascular disease risk from sedentary behavior is a documented and real public health concern. The prophets were not inventing a problem.
But the endpoint — the total physical collapse, the evolutionary abandonment of bipedal locomotion, the species achieving its final horizontal form — has not arrived. What arrived instead was a permanent, exhausting, slightly absurd cultural negotiation between the couch and the gym, between the DoorDash order and the step-count goal, between the Netflix queue and the Peloton subscription gathering dust in the corner of the guest bedroom.
The prophets predicted that technology would make Americans stop moving. Technology did make Americans stop moving. Technology also gave Americans a device that counts their steps, shames them about their steps, and sends them encouraging notifications when they achieve their step goal.
We are a complicated species. We were always going to be.
