**Miami Beach Runs: Is Saltwater Stealing Bones?**

Photograph of Franklin Everett ShawBy Franklin Everett Shaw
August 13, 2025

The salty air of Miami Beach, the rhythmic pounding of feet on the hard-packed sand – it’s a runner’s paradise. But could those idyllic beach runs be silently eroding more than just your running shoes? Let’s dive into a concern that’s been bubbling beneath the surface for Miami’s dedicated runners: the potential link between frequent saltwater exposure and bone health.

The question isn’t whether running is good for you; it undoubtedly is. The concern lies in the environment where many Miamians choose to log their miles. We’re talking about the constant exposure to saltwater, both through the air and potentially through sweat, and its possible impact on calcium levels and, ultimately, bone density.

Here’s the thing: sodium and calcium are intricately linked in the body. When you consume excess sodium, your kidneys work to excrete it. Unfortunately, calcium often gets swept along for the ride. This is a well-established physiological process.

Now, imagine a Miami Beach runner, consistently breathing in salty air, perhaps even tasting the salt spray on their lips. They’re also sweating, and that sweat contains sodium. This constant exposure could potentially lead to increased calcium excretion, and over time, this could contribute to a decrease in bone mineral density, raising the risk of osteoporosis.

This isn’t some abstract, theoretical concern. Osteoporosis is a significant health issue, particularly for women, and anything that could exacerbate the risk deserves attention. We need to look at the specific conditions of Miami Beach running and how they might amplify this sodium-calcium connection.

So, what can a dedicated Miami Beach runner do? The answer isn’t to abandon the beach (though we’ll explore alternatives). It’s about understanding the risks and implementing strategies to mitigate them.

First, hydration is key. But not just any hydration. We’re talking about strategic hydration with electrolytes. Plain water, while essential, won’t replace the electrolytes lost through sweat, including sodium, potassium, and yes, calcium. Consider electrolyte-rich drinks or supplements, especially during and after long runs. Look for products specifically formulated for endurance athletes in hot, humid climates. Nuun tablets, for example, are a popular choice, and readily available at local running stores like iRun in South Miami.

Second, dietary calcium is crucial. This isn’t just about drinking milk. Many people are lactose intolerant or simply don’t consume enough dairy. Focus on calcium-rich foods like leafy green vegetables (kale, collard greens), fortified plant-based milks (almond, soy), tofu, and canned salmon with bones. Consider a calcium supplement, but talk to your doctor or a registered dietitian first. They can help you determine the appropriate dosage and form of calcium for your individual needs. Remember, more isn’t always better. Excessive calcium supplementation can have its own risks.

Third, vitamin D is your best friend. Vitamin D plays a vital role in calcium absorption. While Miami is known for its sunshine, many people are still deficient in vitamin D, especially during the summer months when we tend to avoid prolonged sun exposure. Get your vitamin D levels checked and consider a supplement if you’re deficient. Again, consult with a healthcare professional.

Fourth, vary your running routes. Don’t exclusively run on the beach. Incorporate runs in parks like Tropical Park or along the paved paths of the Rickenbacker Causeway. This reduces your constant exposure to saltwater.

Fifth, strength training is non-negotiable. Running is great for cardiovascular health, but it’s not enough to build strong bones. Weight-bearing exercises, like squats, lunges, and deadlifts, are essential for stimulating bone growth. Find a qualified personal trainer in Miami who can design a program tailored to your needs and running goals. Many gyms in the Brickell area offer specialized training programs for runners.

Sixth, consider a bone density scan. If you’re a long-term Miami Beach runner, especially if you’re a woman over 50 or have other risk factors for osteoporosis, talk to your doctor about getting a bone density scan. This will give you a baseline measurement and allow you to track any changes over time.

Seventh, be mindful of your sweat rate. Everyone sweats differently. Pay attention to how much you sweat during your runs and adjust your hydration and electrolyte intake accordingly. A simple way to estimate your sweat rate is to weigh yourself before and after a run. The difference in weight, plus the amount of fluid you consumed, will give you a rough estimate of your sweat loss.

Eighth, pay attention to the time of day. Running during the hottest part of the day increases your sweat rate and electrolyte loss. Opt for early morning or late evening runs when the temperature is cooler.

Ninth, choose your running gear wisely. Wear moisture-wicking clothing to help keep you cool and dry. This can reduce the amount of salt that accumulates on your skin.

Tenth, listen to your body. If you’re experiencing muscle cramps, fatigue, or other symptoms of electrolyte imbalance, slow down, rehydrate, and replenish your electrolytes. Don’t push through the pain.

A common pitfall is assuming that because you live in a sunny place, you’re automatically getting enough vitamin D. This is a dangerous assumption. Many people spend most of their time indoors, even in Miami.

Another mistake is relying solely on sports drinks for electrolyte replacement. Many commercial sports drinks are high in sugar and low in electrolytes. Read the labels carefully and choose products that are specifically formulated for endurance athletes.

Finally, don’t ignore the importance of a balanced diet. No amount of supplementation can compensate for a poor diet. Focus on eating whole, unprocessed foods that are rich in nutrients.

The potential link between frequent saltwater exposure and bone health is a real concern for Miami Beach runners. But by understanding the risks and implementing these strategies, you can continue to enjoy your beach runs while protecting your bone health. It’s about being proactive, informed, and taking care of your body. Don’t let the fear of osteoporosis keep you off the beach, but don’t ignore the potential risks either. Run smart, hydrate well, and stay strong.

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