For many runners, injuries are an unavoidable part of the sport — blamed on overtraining, bad shoes, or sheer misfortune. But new research from the Eindhoven University of Technology suggests a quieter culprit: the hours lost in restless sleep.
In a study published this month in Applied Sciences (MDPI), researchers Jan de Jonge and Toon W. Taris found that runners who sleep poorly are nearly twice as likely to suffer sports injuries compared to those who sleep well. The finding, based on data from 425 recreational runners in the Netherlands, reframes sleep not as a luxury, but as a protective layer against injury.
Study Maps Out the Hidden Role of Sleep
The study — “Sleep Matters: Profiling Sleep Patterns to Predict Sports Injuries in Recreational Runners” — used a statistical method called latent profile analysis to group participants based on their sleep habits, quality, and nighttime disturbances. The goal was to understand whether certain sleep “types” were more prone to injury than others.
From the data, de Jonge and Taris identified four distinct sleep profiles:
- Steady Sleepers, who consistently enjoyed long and restful nights.
- Efficient Sleepers, who slept fewer hours but with high sleep efficiency.
- Fragmented Sleepers, who frequently woke up during the night.
- Poor Sleepers, who combined short sleep with frequent disturbances.
It was this last group that raised alarm. “Runners with poor sleep were 1.78 times more likely to report an injury compared to steady sleepers,” said Professor Jan de Jonge, the study’s lead author. Nearly 68 percent of these runners had experienced at least one sports-related injury in the previous year.
Why Sleep Matters for Extreme Running
The link between sleep and injury risk may seem intuitive — tired athletes make mistakes — but the mechanisms run deeper. During deep sleep, muscles repair microscopic damage from training, and the nervous system recalibrates coordination and balance. Poor sleep disrupts these vital recovery cycles.
“Sleep deprivation affects both the mind and body,” said co-author Professor Toon W. Taris, who studies occupational and sport psychology. “Reaction time slows, concentration drops, and physical control declines — all of which can increase the chance of injury, even in recreational athletes.”
The researchers believe sleep quality should be treated as a key part of athletic training, on par with nutrition and conditioning. Their results add to a growing body of evidence showing that sleep loss impairs performance, decision-making, and injury resistance — not only among elite athletes but also in everyday runners.
From Roads to Mountains: Wider Implications
Although the study focused on recreational road runners, its message resonates across endurance sports — from marathoners to extreme trail runners. In ultra-distance events where athletes run through nights and extreme fatigue, chronic sleep loss could multiply the risk of accidents and overuse injuries.
“Many athletes push through exhaustion, assuming mental toughness compensates for lack of rest,” said de Jonge. “But our data show that recovery is not optional. Without sufficient sleep, the body’s ability to adapt and heal simply breaks down.”
Sports scientists note that small improvements in sleep hygiene — such as maintaining a regular bedtime, reducing screen use before bed, and ensuring full rest days — could drastically reduce injury rates over time.
Limitations, but Strong Signals
De Jonge and Taris acknowledged that their research relies on self-reported sleep data and does not establish direct causation. However, the consistency of the findings provides compelling evidence that sleep patterns are a meaningful predictor of injury risk.
The authors recommend further longitudinal studies using objective sleep measures, such as wearable trackers or EEG monitoring, to strengthen the evidence. Still, their conclusion is clear: poor sleep undermines resilience in sport as surely as overtraining does.
For runners obsessed with pace, mileage, and heart-rate data, this study delivers a simple reminder — one that may be harder to follow than any training plan: recovery is the real work.
“Good sleep is not a passive activity,” said Taris. “It’s an active process that strengthens both mind and body. Ignoring it means running on borrowed energy.”
As the data from Eindhoven suggest, the line between progress and pain might be drawn not on the track, but in the quiet hours before dawn — when the smartest athletes are still asleep. (Wage Erlangga)
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