Can you still build bone mass in your fifties?
After fifty, genuine bone building is probably no longer achievable, but you can substantially limit the loss. Combining strength training with weight-bearing exercise is the best approach currently available for doing so.
Building bone mass after fifty is probably not realistic. What is achievable is slowing the loss considerably. In a randomised study of 160 obese older adults, hip bone density fell by 3% in people who did cardio training alone. Those who combined it with strength training lost only 1%. New bone was therefore not being formed, but the loss was clearly limited.
Bone mass built up earlier in life counts for a great deal. People who were physically active throughout their lives have more bone mass around the age of forty than those who were not. That larger 'bone reserve' pushes back the point at which osteoporosis causes clinical symptoms. This makes what you did in your younger years, or are still doing now, relevant to your future health.
What causes bone mass to shrink most rapidly is weight loss achieved purely by cutting food intake, without additional exercise. This comes at the expense not only of fat mass, but also of muscle and bone tissue. Particularly in people aged fifty and over, this worsens the normal age-related loss. Exercise is therefore not a supplement to a diet, but a necessary counterweight.
International guidelines for osteoporosis recommend weight-bearing exercises and strength training as the standard non-pharmacological measure for people aged fifty and over. Think of walking, climbing stairs, dance classes or resistance exercises. Aerobic fitness training also helps, but strength training appears to protect bone better. A considerable proportion of what people regard as inevitable bone loss is linked to too little exercise and insufficient protein and other nutrients, and is therefore partly preventable.
All claims are based on reviews and one randomised multicentre study (PMID 28514618). There is no meta-analysis in the source list. The strength of evidence for slowing bone loss through exercise is moderate; for the reversibility of bone loss after fifty, the evidence is too limited to make a firm statement.
Can adults still build bone mass, or only maintain it?
As an adult you can still build bone mass, although the gains are more modest than in earlier life. Strength training, at least three times per week at high intensity, has the best evidence base for this.
How do you prevent bone loss when losing weight at an older age?
Strength training while losing weight is the best protection against bone loss, but cannot prevent it entirely. Combine it with adequate protein intake and discuss it with your doctor if you are losing weight quickly or in large amounts.
Which type of training has the best-proven track record against bone loss in later life?
High-intensity resistance training (at least 70-85% of maximum load, two to three times per week, for at least eight to twelve months) works best for bone preservation. If you also want to address your fall risk and muscle strength, a combined programme of strength, balance and fitness is the smartest choice.
How quickly do you lose bone mass when you stop exercising?
Stopping exercise demonstrably leads to bone loss, but exactly how quickly that happens is not precisely known. Weight-bearing exercise and strength training are the best protection, so try to maintain them as much as possible or resume them promptly.
Why do bones break more easily as you get older?
With age, bones become both thinner and more fragile through a combination of hormonal changes, deteriorating bone structure and reduced physical activity. Understanding which factors are involved helps you take targeted action: sufficient exercise and a calcium-rich diet are the most concrete levers you have within your own control.
Does too little protein increase your risk of bone fractures as you age?
Yes, too little protein increases your risk of bone fractures in older age. This works through weaker bones as well as through poorer muscle strength. Aim for at least 1.0 to 1.1 grams of protein per kilogram of body weight per day, preferably through dairy, together with sufficient calcium and vitamin D.