Exercise for optimising peak bone mass in women.

Area of Science:

• Exercise science
• Bone health
• Biomechanics

Background:

• Physical activity is crucial for bone mineral density (BMD) and geometry, reducing fracture risk.
• Optimal exercise prescription (type, intensity, frequency, duration) is needed for bone health.
• High-magnitude, rapid, and novel loading is most effective for bone health.

Purpose of the Study:

• To evaluate brief high-impact unilateral exercises for optimizing bone health in premenopausal women.
• To determine the effectiveness of hopping exercises for increasing BMD.
• To provide a model for defining efficient exercise recommendations for bone health.

Main Methods:

• Assessed the feasibility of brief high-impact unilateral hopping exercises for sedentary premenopausal women.
• Measured ground-reaction forces during hopping exercises.
• Compared femoral-neck BMD changes over 6 months between a trained leg and a control leg.

Main Results:

• Hopping exercises were feasible and generated high ground-reaction forces comparable to jumping.
• Regular hopping exercise for 6 months significantly increased femoral-neck BMD in the trained leg.
• Unilateral high-impact exercise demonstrated site-specific improvements in bone strength.

Conclusions:

• Brief, unilateral high-impact exercises like hopping are effective for improving BMD in premenopausal women.
• This exercise model can help define optimal prescriptions for enhancing bone health.
• Unilateral exercises may improve bone strength in the trained limb, offering targeted benefits.