Preventing The Injury Before It Happens

ASport is prescribed as medicine and delivered as risk, a contradiction that coaches have learned to live with rather than to resolve. For most of the twentieth century the injuries sustained in training and competition were treated as misfortunes: regrettable, unevenly distributed, and beyond the reach of anything except luck and rest. The first serious challenge to that fatalism came not from a new treatment but from a negative result, since a series of trials conducted between 1994 and 1999 established that the stretching routines then performed before every match had no measurable effect on soft-tissue injury, and the profession was thereby obliged to ask what, if anything, did. The answer assembled over the following two decades was that a substantial share of injuries are not accidents but the predictable consequence of how athletes move and of how much they are asked to do. Prevention, on this view, is a problem of design. Which of those two levers matters more is still contested.

BThe movement-quality case is most closely associated with Petra Zeleny of the Halden Centre for Sports Medicine, who maintains that the knee injuries ending so many careers are produced by a landing pattern which can be retrained within a matter of weeks. Between 2013 and 2017 her group randomised 62 handball clubs either to their usual preparation or to a twenty-minute neuromuscular routine of balance work, controlled landings and single-leg strength, performed instead of the customary jogging and stretching. Clubs assigned to the routine recorded 38 per cent fewer serious knee injuries across four seasons, a result substantial enough to alter national guidance in three countries. Zeleny is careful about the boundary of the claim. The benefit appeared only in squads that completed at least two supervised sessions a week, and where the routine was performed once or sporadically the injury rate could not be distinguished from that of the control clubs.

CWhat happened next has become the standard cautionary tale of the discipline. When the same routine was distributed across an entire federation in 2021, with printed guidance and an instructional video but no supervisor in the changing room, the fall in knee injuries came to 11 per cent, barely a quarter of the effect obtained under trial conditions. Audits established that only 38 of the participating clubs, out of more than four hundred, were still running the routine in full by midseason. Zeleny concedes that this collapse is the central weakness of her position, though she insists it is a weakness of implementation rather than of mechanism, and she has argued that a programme nobody performs cannot be said to have failed. Her critics reply that a preventive measure depending on constant supervision is, for practical purposes, a measure that most clubs will never receive.

DThe rival account shifts attention from technique to quantity. Tomás Marchesi, a physiologist at the Coimbra Institute of Human Performance, contends that most non-contact injuries follow not from faulty movement but from abrupt increases in the amount of work an athlete is asked to absorb. Analysing 1,180 player-weeks of training records gathered from professional football, he reported that the risk of a soft-tissue injury roughly tripled in any week when the distance covered exceeded the player's own four-week average by more than 25 per cent. The appeal of the finding is that it requires no new exercise, only restraint. The rule that follows is deliberately blunt, since a threshold expressed as a single number can survive translation into a coach's weekly plan in a way that a nuanced curve cannot. Marchesi concedes, however, that his data were observational rather than experimental, that workload was captured solely as distance recorded by satellite tracking, and that his sample consisted of senior men in a single league.

EA more fundamental objection has come from outside sports medicine altogether. Mirela Vukas, a statistician at the same institute, is sceptical of the ratio on which Marchesi's threshold depends, since dividing a recent workload by a longer average produces a quantity that rises whenever the denominator happens to be low, irrespective of what the athlete has actually done. To demonstrate the point she generated training records in which injuries had been assigned entirely at random, and the analysis nevertheless returned an apparent 24 per cent increase in risk above the same threshold. Marchesi does not dispute the arithmetic. He objects instead that simulated athletes cannot become tired, and that a method capable of producing a spurious signal may still be detecting a genuine one in the field. Vukas accepts that her demonstration says nothing about whether sudden workload spikes are dangerous, only about whether this particular measure can prove that they are.

FPractitioners, who must act before the argument ends, have quietly settled on a compromise that neither camp fully endorses. Most elite programmes now combine an abbreviated version of the neuromuscular routine with a rule limiting week-to-week increases in training volume, on the reasoning that the two measures address different populations of injury and that neither is expensive. The deeper obstacle is not scientific but organisational, because preventive work competes for the same twenty minutes that coaches would otherwise devote to tactics, and its benefit remains invisible whenever it succeeds. Neither Zeleny nor Marchesi treats the arrangement as a settlement, and each has written that it borrows the least demanding element of the other's position. That asymmetry is unlikely to be corrected by further trials. Until a club can see the injuries it did not sustain, the evidence assembled since 1994 will keep losing arguments to the fixture list.