Articles

This article breaks down bone health so you can build up bone strength that lasts. Learn how bones adapt, why load-bearing exercise is non-negotiable, and simple ways to support bone health.   We’ve all been told that calcium is the key to strong bones – but science shows us that exercise is just as essential. In fact, for adults concerned about osteoporosis or bone loss, physical activity is one of the most powerful tools we have to protect bone health.  “ Bones don’t strengthen by chance; they strengthen in response to load” Bones are Living Tissue It’s easy to think of bones as hard, static structures, but they’re actually living, dynamic tissue. Inside every bone are specialised cells that constantly rebuild and reshape the skeleton in response to the stresses we put on it.  Osteoblasts build new bone Osteoclasts break down old bone Osteocytes act as the ‘sensors’ detecting strain and signalling when to strengthen or repair bone This process is called bone remodelling and it keeps our skeleton strong and adaptable throughout life.    Mechanical Loading: The Signal Bones Respond To  Here’s the key point: bones strengthen in response to load. When muscles contract against resistance or when you land on your feet during an impact, tiny stresses travel through the bone tissue. These microscopic strains activate the bone’s cells. Promoting them to deposit more minerals and increase density where it’s needed. This concept is supported by decades of research. Studies using DEXA scans show that:  Weight bearing and resistance exercises can improve bone mineral density (BMD) in the spine and hips; two of the most common fracture sites.  In contrast, non-weight bearing activities like walking, swimming or cycling, have little direct benefit for bone density. The Science In Action In clinical trials, postmenopausal women who performed progressive resistance training two to three times a week showed improvements in BMD over 12 months compared to those who did stretching or light aerobic exercise. Importantly, these effects were site-specific, meaning bones strengthening where the loading occurred (for example, squats improving hip density). The reason is simple: exercise tells your bones what part of the skeleton needs reinforcement. When muscles pull on bone, they send a message that this region is important and must be kept strong.    The Bottom Line Calcium and vitamin D are essential, but they only give your body the raw materials. Exercise provides the blueprint and the builder.  By regularly stressing your bones in healthy ways, you help maintain bone mass, muscle strength, and balance – all critical factors in preventing osteoporosis and fractures as you age.  Exercise is the only ‘drug’ that both stimulates osteoblasts and improves balance and muscle strength, reducing falls and fractures.    Whether you are approaching perimenopause, have received an osteopenia diagnosis, or simply want to get on the front foot with bone health, come see us at Citrus. Let’s create a personalised plan to build muscle, get stronger, and refresh your zest for life.  

We weigh up weight loss medications and muscle health, showing why the numbers on the scale aren’t the whole story and why at Citrus, we believe exercise is still essential. Weight loss medications are becoming increasingly common in the management of obesity and metabolic disease. While these medications can be effective for reducing body weight, an important and often overlooked consideration is their impact on muscle mass and physical function.  Preserving muscle during weight loss is critical – not just for strength, but for long-term health, metabolic function, and independence.  “Muscle is not optional tissue – preserving it during weight loss protects strength, metabolism, and overall health”   Weight Loss Is Not Just Fat Loss When body weight decreases, the loss typically includes a combination of:  Fat mass Lean mass  Research consistently shows that without appropriate intervention, 20-30% of weight loss may come from lean tissue. This is clinically significant, as skeletal muscle plays a key role in:  Glucose regulation and insulin sensitivity  Resting metabolic rate Joint stability and injury prevention Balance, mobility, and falls risk Loss of muscle mass can undermine the long-term benefits of weight loss, particularly in women, older adults, and those already physically inactive.    How Weight Loss Medications Can Affect Muscle Many weight loss medications work by reducing appetite, increasing satiety, or altering gut hormones. While effective for calorie reduction, these mechanisms can unintentionally lead to:  Reduced overall energy intake Lower protein consumption Decreased spontaneous physical activity due to fatigue or nausea When calorie intake drops without adequate protein and mechanical loading through exercise, the body has little stimulus to maintain muscle tissue – leading to muscle loss alongside fat loss.   Why Muscle Preservation Matters  Muscle is not optional tissue; it is metabolically active and protective. Loss of muscle mass is associated with:  Reduced strength and functional capacity Increased risk of falls and fractures Slower metabolism and weight regain Poorer long-term cardiometabolic outcomes  In some cases, significant muscle loss can result in individuals weighing less, but functioning worse.    The Role of Exercise Physiology Exercise Physiologists play a critical role in support individuals using weight loss medications by prescribing exercise that prioritises muscle preservation and functional health.  Key components include:  Progressive resistance training: resistance exercise provides the mechanical stimulus required to maintain or build muscle during weight loss. Adequate training frequency: 2-3 sessions per/week targeting major muscle groups, adjusted for tolerance and recovery. Functional movement training: supporting daily activities, balance and joint health. Energy and fatigue management: programs are adjusted to account for medication side effects such as nausea or reduced energy intake. Exercise prescription should be individualised, safe, and progressive – particularly for those with chronic conditions or a long history of inactivity.    A Long-Term Health Perspective Weight loss medications can be a valuable tool, but they are not a standalone solution. Without resistance training and movement that challenges the musculoskeletal system, there is a real risk of trading body weight for strength, function and resilience. The goal is not just weight loss but healthy weight loss, where the muscle mass, bone health, and physical capacity are preserved.    The Takeaway If you are using, or considering, weight loss medications, it is essential you also exercise. A structured exercise program, particularly one that includes resistance training, helps ensure that weight loss improves health, function, and quality of life rather than compromising them.  Protecting muscle means protecting your future movement, independence, and long-term wellbeing.    Come see us at Citrus where we believe movement is medicine for health, recovery, and everyday life.  Let’s create a personalised plan to get you moving, feeling in your element, and refresh your zest for life.