Cycling, a beloved sport for many, has an often-overlooked dark side: its impact on bone health. The high-volume, low-impact nature of cycling, combined with its energy demands, creates a 'perfect storm' that can leave riders with fragile, 'chalky' skeletons. This article delves into the reasons why cycling is a disaster for bone health, the evidence supporting this claim, and the interventions that can help safeguard your skeleton. Personally, I think it's fascinating how a seemingly innocuous activity can have such profound effects on our bodies. What makes this particularly intriguing is the interplay between the sport's physical demands and the body's metabolic responses. From my perspective, understanding these dynamics is crucial for both cyclists and sports scientists alike. One thing that immediately stands out is the irony of cyclists pushing their bodies to the limit while potentially undermining their long-term health. If you take a step back and think about it, the high-volume training, lack of mechanical loading, and low energy availability inherent in cycling create a unique set of challenges for bone health. Cycling's bone density crisis isn't confined to professional riders; even amateur cyclists who train for just 6-12 hours a week can experience negative effects. This raises a deeper question: how can we balance the pursuit of athletic excellence with the preservation of our long-term health? The UCI's guidance note, authored by leading sport scientists, highlights the issue of cycling as a 'perfect storm' for bone health. This is supported by research showing that one season in professional cycling is enough to negatively affect bone health. The same study found that bone mineral density levels in amateur cyclists are below those recommended by the North American Health Survey, even with relatively moderate training volumes. This is a critical finding, as it suggests that the impact on bone health is not limited to elite athletes. Sadly, I can attest to this firsthand. I was diagnosed with osteopenia while grappling with an eating disorder and RED-S, highlighting the very real consequences of cycling's impact on bone health. But don't despair just yet. There are simple interventions that can help safeguard your skeleton. The key lies in diet and lifestyle adjustments. Firstly, ensuring adequate energy availability is crucial. Sport scientists suggest that endurance athletes target an energy availability of approximately 40-45 calories per kilo of fat-free mass per day to maintain prime metabolic function. This is essential for good bone health. Secondly, the composition of your diet matters. Carbohydrates, protein, and healthy fats all play a role in bone health. Emerging evidence suggests that carbohydrate intake is more important to bone health than total caloric intake. The UCI research note recommends that riders training for 1 hour a day should aim for 5-7 grams of carbohydrate per kilo of body weight per day, while those training for up to 3 hours should aim for 6-10g/kg. Additionally, protein is vital for bone health, contributing around 50 percent of total bone volume. Aim for around 2 grams of protein per kilo of body mass. Lastly, calcium and vitamin D are essential for bone health. Calcium is the core scaffolding of bone, and inadequate dietary calcium can lead to bone resorption. Vitamin D helps the body absorb calcium and convert it to bone mass. In my opinion, these interventions are not just theoretical concepts but practical steps that cyclists can take to protect their bone health. However, it's important to note that these interventions are not a panacea. Cross-training and strength training are also crucial for maintaining bone density and athletic longevity. Activity that loads the skeleton, such as running, jumping, lifting heavy weights, or punching and kicking, is essential. Brief, regular bouts of high-impact jumping can be sufficient to maintain bone mass, according to research. But that shouldn't be used as an excuse to neglect strength training. All cyclists should incorporate strength training into their routine. Monitoring bone health is also important. Bone density is assessed with a DEXA scan, typically of the hip and lumbar spine, and occasionally the wrist. WorldTour teams typically test their riders' bone scores during routine annual health checks. If you're experiencing unexplained stress fractures or symptoms of low energy availability or RED-S, it's important to consider bone density testing. In conclusion, cycling's impact on bone health is a complex issue that requires a multifaceted approach. By understanding the risks and implementing simple interventions, cyclists can safeguard their skeleton and enjoy the sport for years to come. So, ride smart, eat well, and incorporate cross-training and strength training into your routine. Your bones will thank you later.
