When a playlist pushes back the wall of fatigue

At the gym, in the park or on the athletics track, headphones have become almost as indispensable as sneakers. This habit is by no means anecdotal: research shows that music acts as a genuine adjuvant to effort, to the point that some specialists describe it as an "ergogenic" factor, capable of improving muscular performance without resorting to chemistry.

On March 11, the scientific journal Psychology of Sport & Exercise published a study conducted in gyms. Conducted by a mainly Finnish team from the University of Jyväskylä, the study involved 29 active adult cyclists on cycle ergometers, pushed to exhaustion at around 80% of their maximum power. The protocol was based on two identical sessions for each participant, one in silence and the other with a self-selected playlist. The researchers then compared, in particular, time to exhaustion, heart rate and blood lactate.

The results were unequivocal. When participants exercised to their favourite music, they were able to maintain the effort several minutes longer before reaching exhaustion, sometimes up to almost 20% longer depending on the individual. At equal intensity, they "stay" longer in the pain zone, that moment when thighs burn and each pedal stroke becomes an internal negotiation. Yet their physiological parameters - intensity of effort, power output - do not change fundamentally: what does change is their ability to tolerate discomfort.

The Finnish researchers behind the study put forward a clear hypothesis: music doesn't make exercise objectively easier, but changes the way the brain interprets bodily signals. By mobilizing reward circuits, it injects pleasure into an otherwise painful experience, and, by contrast, postpones the moment when the effort becomes psychologically unbearable. The fact that the songs are self-selected is not insignificant: the familiarity and emotional charge of the songs amplify the effect, as several meta-analyses of music and sports performance have already shown.

In short, music modifies the perception of effort. By providing an external anchor - a rhythm, a melody, sometimes familiar lyrics - it diverts attention from fatigue signals, such as muscle burning or breathlessness.

This study is part of a larger body of work confirming the "ergogenic" effect of music in endurance efforts: moderate but real improvement in performance, lower perceived exertion, more positive mood during and after the session. For weekend athletes and trainers alike, the conclusion is clear: a good playlist, adapted to the tempo of the exercise, is a simple, inexpensive and non-toxic way of enriching training.

There is an important nuance: above a certain intensity, close to the anaerobic threshold, the effect of music tends to fade, as physiological distress signals become too dominant to be "masked" by sound. But for the majority of endurance sessions - jogging, cycling, rowing - music appears to be an invaluable tool for making effort more bearable, and therefore more frequent. And what if the real revolution in sports is in the way we compose our playlists?