Former professional cyclist Peter Sagan described the experience of returning to the racing environment as “strange,” noting a visible shift in athlete physiology. According to local media reports, Sagan observed that contemporary cyclists are thinner than the riders he competed against during his active career.
Observations on Modern Athlete Physiology
Sagan noted a distinct difference in the physical profiles of current professionals compared to the peloton of his era. The three-time world champion pointed to the leaner frames of today’s riders as a primary observation upon his return to the circuit.

Returning to the races was strange. Cyclists are thinner than when I rode.
Peter Sagan
The comment highlights a perceived evolution in the sport’s approach to body composition and weight management. According to the report, this contrast in physique was one of the most striking elements for Sagan as he transitioned from an active competitor to an observer of the current professional landscape.