When most people think about exercise for their health, they picture going for a run or hopping on a bike.
But a growing body of research is making one thing very clear: resistance training, or lifting weights, may be one of the most powerful things you can do for your long-term health. And if you're between 35 and 55, the window to build and protect your muscle and bone is open right now.
Muscle and bone are about more than looking fit
Here's something that might surprise you: low muscle mass is actually an independent risk factor for early death, even when researchers account for body weight and metabolic health. A large analysis of over 80,000 adults found that people with low muscle mass had a 57% higher risk of dying from any cause compared to those with more muscle. Bone density tells a similar story. Studies consistently show that resistance training at least three days per week, at a moderate to high effort level, produces meaningful improvements in bone density at the spine and hip. These are the two sites most vulnerable to fracture as we age. The takeaway? Muscle and bone aren't just about looking fit. They're about staying alive and independent.
What evidence-based resistance training looks like
So what does evidence-based resistance training actually look like? Aim for at least two to three sessions per week, working at a challenging effort level. Think weights that feel difficult by the last few repetitions. You don't need to max out every session, but consistency and progressive challenge over time are what drive adaptation. On the nutrition side, research supports getting around 1.6–2.0 grams of protein per kilogram of body weight per day, spread across meals, to support both muscle growth and bone health. For a 150-pound person, that's roughly 110–135 grams of protein daily, which is more than most people currently get.
It's never too late to start
The good news is that it's never too late to start. Studies show that even older adults who begin resistance training see dramatic improvements in muscle mass, metabolic health, and functional capacity. And for women approaching perimenopause, resistance training appears to outperform aerobic exercise alone for bone density, body composition, and even symptom management. If you've been told that cardio is the cornerstone of a healthy lifestyle, the science increasingly suggests that lifting should share that spotlight, if not take the lead.
Want a strength program built to protect your muscle and bone for the long run? Kauno's coaches design evidence-based resistance training around your goals and history.
book a sessionthe takeaway
Building and protecting muscle and bone through resistance training isn't about aesthetics. It's about staying alive, strong, and independent as you age.
Frequently asked questions
How often should I lift weights?
Aim for at least two to three sessions per week at a challenging effort level, with weights that feel difficult by the last few repetitions. Consistency and progressive challenge over time are what drive adaptation.
How much protein do I need to support strength training?
Research supports around 1.6–2.0 grams of protein per kilogram of body weight per day, spread across meals. For a 150-pound person, that's roughly 110–135 grams daily, more than most people currently get.
Is it too late to start if I'm older?
No. Studies show that even older adults who begin resistance training see dramatic improvements in muscle mass, metabolic health, and functional capacity.
Is lifting better than cardio for bone health?
For women approaching perimenopause, resistance training appears to outperform aerobic exercise alone for bone density, body composition, and even symptom management. The evidence suggests lifting should at least share the spotlight with cardio.
