Cortical and trabecular bone analysis of professional dancers using 3D-DXA: a case-control study

Area of Science:

• Orthopedics
• Sports Medicine
• Bone Physiology

Background:

• Professional ballet dancers face unique physiological demands.
• Limited data exists on bone health in elite ballet performers.
• Understanding bone adaptations in dancers is crucial for injury prevention.

Purpose of the Study:

• To investigate femur cortical and trabecular bone characteristics in professional ballet dancers.
• To compare bone density and structure between dancers and matched controls.
• To assess potential osteoporosis risk factors in ballet dancers.

Main Methods:

• Dual-energy X-ray absorptiometry (DXA) scan for femoral bone density.
• 3D-DXA software analysis of trabecular and cortical bone.
• Assessment of anthropometry, maturation, menstrual history, energy availability, and nutrition.

Main Results:

• Dancers showed significantly higher volumetric bone density (integral, cortical, trabecular) and thicker femoral cortex than controls.
• Ballet dancers had lower body weight and later menarche.
• Higher prevalence of primary amenorrhea and low energy availability (<30 kcal/kgFFM/day) were observed in dancers.

Conclusions:

• Professional ballet dancers exhibit superior femur bone density despite identified osteoporosis risk factors.
• Bone adaptations in dancers may offer protection against fractures.
• Further research is needed to elucidate the long-term bone health implications for dancers.