Background <p>Generalized joint hypermobility (GJH) is a highly prevalent condition that affects a person’s exercise tolerance and is frequently associated with joint injuries. This study aimed to evaluate body composition and aerobic/ anaerobic power in young adults with asymptomatic GJH.</p> Methods <p>Sixty university students aged 18–25 years (30 with GJH, 30 controls) participated in the study. GJH was defined using a Beighton score ≥ 5. Body composition was assessed using the Tanita BC-601 device. Aerobic power was measured with the shuttle run test, while anaerobic power was calculated using vertical jump height and the Lewis Nomogram formula. Analysis of covariance (ANCOVA) was applied to control for age and gender effects.</p> Results <p>ANCOVA results revealed statistically significant differences between groups in mineral percentage <b>(</b>partial η²ₚ = 0.093, <i>p</i> =.020<b>)</b> and aerobic power <b>(</b>partial η²ₚ = 0.256, <i>p</i> &lt;.001<b>)</b> after adjusting for age and gender. No significant group differences were found in other body composition variables or anaerobic power (<i>p</i> &gt;.05). Gender significantly affected lean mass, muscle mass, fat percentage, and aerobic and anaerobic power (<i>p</i> &lt;.05).</p> Conclusions <p>The study demonstrated that GJH has a distinct and independent impact on aerobic capacity. Additionally, mineral percentage differences regarding body composition were noted between groups.</p> Clinical trial number <p>Not applicable.</p>