Climbing Science and Its Gender Bias

A meta-analysis published on January 9, 2026, in Frontiers in Sports and Active Living delivers a blunt assessment of scientific research on high-level climbing: its conclusions rely overwhelmingly on male data. Across a pool of 246 studies measuring performance, 66.5% of participants were men, compared with 22.7% women, and only 34 papers offered a real sex-based comparison. For years, then, climbing science has operated under a thin veneer of universality while quietly treating male physiology as the default.

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The review, led by Kaja Langer and her team, focuses specifically on performance factors in “advanced to elite” athletes across bouldering, lead, and speed. That is exactly the level where training optimization and injury prevention require real precision, and it is also where the imbalance is hardest to ignore. Of the 246 studies included, 102 looked only at men. Just 8 focused only on women. This is not a new problem. In late 2025, a study led by Danielle Lee had already flagged the chronic underrepresentation of women in climbing research, both in the athlete groups being studied and in the research teams themselves.

The myth of the universal body

For a long time, sports science has generalized findings from samples that were never truly representative in the first place. That does not always come from a conscious decision, but the consequences are real. When researchers test mostly male subjects, the data they collect on strength, endurance, and recovery mostly describes men.

“Women are not simply small men”

As the study’s authors note in pointing to an “obvious male bias,” that kind of extrapolation quickly runs into limits. Frontiers puts it plainly: “women are not simply small men.” Different physiology means different biomechanical and metabolic responses.

That lack of representation directly affects the areas that matter most in athletic preparation. Among the 34 comparative studies identified, the research base is especially thin on key topics. Only two papers deal with training and adaptation. Two focus on injury and mental health. Three look at cognitive and psychological factors. Put simply, sex-specific data is missing in exactly the areas where coaches and medical staff need it most.

Injury research is a clear example. Existing studies suggest that women climbers are more likely to deal with issues affecting the shoulders, neck, and head, while men are more exposed to finger, elbow, and ankle injuries. So when prevention protocols are built mainly from male injury data, they leave out a meaningful part of the clinical reality. The point is not to split climbing into two sealed-off categories. It is to recognize that the drivers of performance, and the body’s points of vulnerability, may differ by sex.

The cost of the scientific gap

Nutrition and energy availability may be where the research lag does the most damage. In a sport where power-to-weight ratio matters, low energy availability, including RED-S, can pose a major health risk for athletes. And yet coaches and support staff still lack well-validated benchmarks for adjusting training load and nutrition to the realities faced by women climbers.

A 2025 review on nutritional needs in climbing had already pointed to a glaring lack of documentation and the absence of recommendations specifically designed for women. What little data does exist still raises concern. In the cohorts studied, 80% of women climbers did not meet recommended daily iron intake, and 30% showed clear iron deficiency. This goes well beyond an academic debate. It is about bodies that struggle to recover and absorb training with a much smaller margin for error.

That is exactly why the international SAGER guidelines, short for Sex and Gender Equity in Research, call on scientists to report clearly and rigorously how sex and gender are handled in their studies. Their message is straightforward: leaving out that dimension “limits the generalizability of results.”

In the end, this major review challenges the idea that elite climbing is somehow neutral. It is a reminder that even in a sport that measures performance through precise metrics and technical language, watts, grip strength, grades, gender bias does not disappear on its own. The issue for sports science is no longer just whether participation numbers look balanced on paper. It is whether the field is ready to adopt the methodological rigor this work demands, and stop confusing the most studied body with the universal one.