Great question!
Ultimately, I do think Reformer Pilates can help support bone density — especially if you’re using spring tensions that feel appropriately challenging for exercises designed for heavier resistance.
That being said, I believe the biggest benefits of Reformer Pilates (and Pilates in general) go beyond bone density alone. Pilates helps us develop better body mechanics, improve posture, build core strength, enhance balance (which is incredibly important for fall prevention), maintain joint mobility, and strengthen the muscles that support and protect our joints.
So, if your sole goal is maximizing bone density, traditional weight training may be more effective. But if your goal is to support long-term strength, movement quality, posture, and overall longevity while also helping keep bones strong, Pilates can be incredibly valuable.
And of course, there’s absolutely nothing wrong with combining both.
Personally, I currently only do Pilates, though as I get older, I may choose to work with slightly heavier spring tensions more often to further support bone health.
Those are my thoughts!