Nutrition, exercise, and bone status in youth

Area of Science:

• Bone biology and skeletal health
• Pediatric health and development
• Exercise science and nutrition

Background:

• Peak bone mass, the maximal bone acquired during growth, is a key determinant of future bone health and fracture risk.
• While genetics play a primary role, environmental factors like physical activity and nutrition significantly influence peak bone mass.
• Understanding these influences is vital for developing effective strategies to promote lifelong skeletal integrity.

Purpose of the Study:

• To review bone growth and maintenance mechanisms.
• To examine how physical activity impacts bone mass in youth.
• To assess the role of nutrition, specifically calcium intake, during childhood and adolescence.

Main Methods:

• Review of existing literature on physical activity and bone status in youth.
• Analysis of studies on the impact of nutrition, particularly calcium, during growth phases.
• Examination of mechanisms linking physical activity to bone health.

Main Results:

• Considerable evidence suggests physical activity is important for bone health in youth, with benefits potentially maximized when initiated before puberty.
• While intervention trial results for calcium intake are equivocal, other evidence supports its role during growth.
• Optimal energy availability is critical for bone growth.

Conclusions:

• Physical activity and adequate nutrition, including calcium, are important environmental contributors to achieving optimal peak bone mass.
• Recommendations for physical activity and nutrition are provided for children and adolescents to support lifelong bone health.
• Further research may be needed to solidify conclusive data, especially from intervention trials.