Exercise for optimizing bone health after hormone-induced increases in bone stiffness.

Area of Science:

• Bone biology
• Endocrinology
• Exercise physiology

Background:

• Bone strength is regulated by hormones and mechanical loading across the lifespan.
• Periods of heightened hormonal activity present unique opportunities for exercise interventions.
• Hormonal influences include endogenous growth hormones, sex steroids, and exogenous drugs like teriparatide.

Purpose of the Study:

• To review the interplay between hormonal influences and mechanical loading on bone.
• To explore how exercise can optimize bone strength during periods of hormonal sensitivity.
• To provide a physiological basis for promoting lifelong exercise for bone health.

Main Methods:

• Review of existing literature on hormonal regulation of bone.
• Analysis of mechanoadaptive responses following hormonal stimuli.
• Synthesis of evidence linking exercise, bone formation, and bone resorption.

Main Results:

• Hormonal stimuli can increase bone stiffness, creating a window for exercise.
• Exercise provides mechanical loading that promotes adaptive bone formation or reduces resorption.
• Combined hormonal and mechanical effects enhance bone strength during development and aging.

Conclusions:

• Exercise is crucial for optimizing bone strength during hormonally sensitive periods.
• Lifelong exercise, particularly during youth and later life, is key for preventing bone fragility.
• Understanding these physiological interactions supports exercise recommendations for bone health across all ages.