Which option best describes readiness to return to sport in relation to energy balance, menstrual function, and bone health?

• A. Adequate energy alone.
• B. Adequate energy balance with normal menstrual function.
• C. Adequate energy balance with normal menstrual function and healthy bone mineral density.
• D. No relation.

Answer: (C)

Readiness to return to sport depends on more than just calories; the body needs sufficient energy availability to support hormonal and skeletal function. When energy balance is adequate, the reproductive system can recover and menstrual function can normalize, which in turn supports bone health. But the bone itself must also be healthy, with normal bone mineral density, so the skeleton can tolerate training loads and minimize fracture risk. Together—adequate energy balance, regular menstruation, and healthy bone density—provide the most complete and safe picture of readiness to resume sport.

Why the other ideas don’t fit: restoring energy alone might not guarantee normal menstrual function or bone recovery, so return to sport could still carry risk. Normal menstrual function without solid bone density means there’s still fracture risk. And there is a real link among energy, hormones, and bone health; treating them as separate ignores the integrated way the body restores function after energy deficiency.