ChAnGe Project: Cardiopulmonary and Strength Analysis in Gender Transition

Why It Matters

Understanding how GAHT alters cardiovascular and muscular performance informs safe training guidelines and promotes inclusive sport participation for transgender athletes.

Key Takeaways

• 16 TGD participants and 16 controls enrolled since Nov 2024
• Study tracks cardiopulmonary changes during gender‑affirming hormone therapy
• Multidisciplinary team combines endocrinology, sports medicine, and imaging expertise
• First longitudinal assessment of strength and metabolism in transitioning athletes
• Findings will guide evidence‑based training and health recommendations for TGD individuals

Pulse Analysis

The under‑representation of transgender and gender‑diverse (TGD) athletes in sports‑medicine research has left clinicians without robust data to advise on training, performance, and health risks. The ChAnGe project addresses this void by prospectively measuring cardiopulmonary capacity, metabolic markers, and muscular strength before and after the initiation of gender‑affirming hormone therapy (GAHT). By pairing each TGD participant with a cisgender control matched for sex assigned at birth, the study isolates the physiological effects of hormone modulation from baseline sex differences, offering a clearer picture of how GAHT reshapes aerobic fitness and muscle function.

Beyond the core measurements, the project leverages advanced imaging and metabolic testing to explore how hormone‑driven changes influence cardiac output, oxygen uptake, and body composition. Early enrollment figures—16 TGD individuals and an equal number of controls—may seem modest, but the longitudinal design provides a rare window into dynamic adaptations over time. These data are poised to inform evidence‑based guidelines for coaches, trainers, and healthcare providers who work with transitioning athletes, helping to mitigate injury risk and optimize performance while respecting individual health goals.

The broader implications extend to policy and inclusion initiatives within sport governing bodies. As the ChAnGe findings emerge, they will likely shape discussions around eligibility criteria, training program design, and health monitoring protocols for TGD competitors. Moreover, the project sets a methodological precedent for future research, encouraging larger, multi‑site studies that can validate and expand upon its insights. In a field where anecdote often substitutes for science, this rigorous, multidisciplinary effort marks a pivotal step toward equitable, data‑driven sport participation for all gender identities.