What is the recommended intensity range for osteoporosis guidelines expressed as a percentage of peak VO2?

• A. 40-85%
• B. 20-40%
• C. 60-90%
• D. 70-100%

Answer: (A)

Osteoporosis exercise guidelines focus on providing enough mechanical loading to stimulate bone growth while staying safe. When we express intensity as a percent of peak VO2, we’re scaling effort to a person’s maximal aerobic capacity, so the same percentage reflects the same relative effort for anyone.

The recommended range for this condition is moderate to vigorous effort, about 40% up to 85% of peak VO2. At the lower end, around 40% offers a sustainable level that still provides a meaningful osteogenic stimulus and improves function for many individuals. As you move toward the upper end, closer to 85%, you gain greater loading on the bones, which can enhance bone density benefits when done safely, typically with supervision and appropriate progression.

Ranges below 40% are generally too light to promote bone health, and those well above 85% can be unsafe for many with osteoporosis due to fracture risk. So 40-85% of peak VO2 best balances the goal of stimulating bone adaptation with the need to protect against injury.