Olivia MillerA 19-Year-Old Who Made Pogačar Sweat — Then Cracked
On Sunday 26 April 2026, French teenager Paul Seixas finished second at Liège-Bastogne-Liège — one of cycling's five Monuments. The 19-year-old held Tadej Pogačar's wheel longer than any other rider, only cracking at the Côte de la Roche-aux-Faucons with 13.9 km to go. He crossed the line 45 seconds behind the world champion.
For Australian cycling fans, the result prompted a wave of searches. But for sports medicine specialists, the story prompts a different question entirely: what does it cost a teenage body to compete at that level?
The Sprint That Made a Season
Seixas has already had a remarkable spring. In April 2026 he won La Flèche Wallonne and the overall title at the Tour of the Basque Country — including three stage wins — and finished runner-up to Pogačar at Strade Bianche in March. This makes him one of the most decorated 19-year-olds in cycling history. His team, Decathlon CMA CGM, signed him as a junior and fast-tracked his transition to the World Tour.
Today's Liège-Bastogne-Liège was the final test of a punishing spring campaign. According to Cyclingnews, Seixas was "the only rider able to follow when Pogačar split the race apart fully" on the Côte de la Redoute. He then cracked — a word that, in elite cycling, means a sudden, steep loss of power. Cyclists and coaches know it well. Sports doctors know it even better.
What "Cracking" Actually Means for a 19-Year-Old Body
The physiological explanation behind a rider "cracking" is well documented: glycogen depletion, accumulated lactate, and central nervous system fatigue combine to make sustained effort impossible. In a 19-year-old who has been racing at the highest level for three months, the picture is more complex.
The Australian Institute of Sport notes that adolescent athletes are still developing — bone density, hormonal regulation, and cardiovascular capacity all continue maturing until the mid-twenties. Pushing those systems into extreme deficit repeatedly carries risks that only appear months or years later: stress fractures, hormone suppression, and the condition now known as Relative Energy Deficiency in Sport (RED-S).
RED-S was first described in female athletes but is now recognised equally in males. According to the British Journal of Sports Medicine, it is characterised by inadequate caloric intake relative to energy expenditure, leading to impaired bone health, immune function, and mood regulation. Elite cyclists typically burn between 4,000 and 6,000 calories on a race day. Getting that balance right across a full racing season, when you are 19, is genuinely difficult.
The Accumulation Problem
Seixas raced eight major events between March and late April 2026. That is a significant cumulative load for any athlete, let alone one whose musculoskeletal system has not fully matured.
Sports scientists refer to this as "acute:chronic workload ratio" — the relationship between the training and racing stress of the current period versus the longer-term baseline the body has adapted to. When that ratio climbs too high, injury risk rises sharply, research published in the British Journal of Sports Medicine shows. A common threshold cited by performance coaches is a ratio above 1.5; in peak stage-racing months, elite junior-turned-pro cyclists routinely exceed it.
This is not a criticism of Seixas or his team — elite athletes accept these risks knowingly. The concern applies more directly to the thousands of young Australians inspired by his example who attempt similar training volumes without professional medical support.
What Australian Parents and Coaches Need to Understand
Seixas's success is extraordinary and, on most metrics, unrepresentative of the typical youth athletic experience. But the visibility of prodigies like him does influence youth sport culture. Australian Cycling's participation data shows cycling registrations in the under-20 age group rose 14 per cent in 2025, a trend that sports clinics across the country have already noticed in consultation volumes.
For the average young Australian cyclist — or indeed any youth athlete pushing for competitive excellence — the critical signals of overtraining include:
- Persistent fatigue that does not resolve after rest days
- Elevated resting heart rate over consecutive mornings
- Unexplained drops in performance despite maintained training
- Disrupted sleep, increased irritability, or loss of motivation
- Recurrent minor injuries such as shin splints or stress reactions
The problem is that young athletes, and often their parents and coaches, normalise these symptoms as a sign of hard work rather than a flag for medical review. According to Sport Australia, fewer than 40 per cent of youth athletes experiencing RED-S symptoms sought medical advice within the same season.
The Role of a Sports Medicine Doctor
A general practitioner can identify many of these warning signs, but a sports medicine specialist brings a more targeted toolkit: bone density scans, VO2 max testing, hormonal panels, and nutrition assessments tailored to an athlete's specific training demands. Crucially, they can distinguish between the fatigue of productive training adaptation and the fatigue of accumulated breakdown.
For Australian families supporting a young athlete in any discipline — not just cycling — a pre-season check with a sports medicine doctor is as important as buying the right equipment. If symptoms emerge mid-season, an early consultation is almost always better than waiting until performance has collapsed.
At Expert Zoom, you can connect with sports medicine doctors and health specialists across Australia who work specifically with youth athletes. They can assess whether your young person's training load is building them up or quietly breaking them down — before a Côte de la Roche-aux-Faucons moment forces the answer.
This article is for informational purposes only and does not constitute medical advice. Consult a qualified health professional regarding any specific concern about athletic health or training.
Seixas's Afternoon at Liège Was a Win, Either Way
Pogačar greeted Seixas at the finish line. In the language of elite sport, that gesture meant something. A 19-year-old who finished second at one of cycling's five Monuments, racing against the world's best, is not a story of failure. But for Australian coaches and parents watching, his performance is also a window into the demands we place on young sporting bodies — and the medical oversight those bodies deserve.
For more on what Australia's elite youth athletes face physically, read about Marcus Younis and the health pressures on young Socceroos or the risks young IPL cricketers face.
More information on youth athlete health guidelines is available from Better Health Channel — Sport and Children, a resource from the Victorian Government.
