Athletes a century ago trained far less than their modern counterparts, and the reason was not ignorance. Deliberate preparation was widely considered a form of cheating.
Amateur ideals discouraged preparation
The amateur code held that sport should be an expression of natural ability exercised in leisure time, not the product of dedicated work.
Under that view, an athlete who trained systematically was gaining an unfair advantage in much the same way as one who was paid to play.
The practical effect was that many competitors arrived at major events having done little beyond playing their sport occasionally.
Training that did happen was often counterproductive
Where preparation existed, it followed customs rather than evidence: severe dietary restrictions, purging regimes, and long walks in heavy clothing to reduce weight.
Fluid intake during exercise was frequently discouraged, on the belief that tolerating thirst built toughness, which is now understood to have impaired performance directly.
Some traditions were sound by accident, particularly the running and bodyweight work in wrestling and rowing, but the reasoning behind them was rarely correct.
Professionals developed methods first
Athletes who depended on winning for income had every reason to prepare, and professional runners, boxers and cyclists developed structured training well before amateurs did.
Their methods circulated informally through trainers rather than through institutions, which is why so much early knowledge was held by individuals and lost with them.
The amateur establishment's disdain for professional sport meant that this knowledge was slow to cross into the events that had the most prestige.
State programmes changed the scale
Through the middle of the twentieth century, national sporting programmes began treating preparation as a technical problem with sport scientists attached to it.
Periodised plans, systematic strength work and physiological testing emerged from that environment and spread outward as their results became visible.
Once athletes prepared that way began winning consistently, the ethical objection to training collapsed, and countries that had resisted it followed within a generation.
The modern constraint is recovery, not permission
Contemporary athletes are limited by how much training their bodies can absorb rather than by any rule or convention about preparing.
That has shifted attention from adding work to managing it, with sleep, nutrition and load monitoring now occupying the time once spent simply doing more.
The historical irony is that modern programmes often prescribe less training than the most enthusiastic amateurs of the mid-century era attempted, but arrange it far more carefully.
