Shoes directly affect the health of science

Shoes are more than just a fashion statement—they serve a fundamental purpose: to protect the health and safety of our feet. However, as climate conditions vary—ranging from cold to warm, dry to wet—different types of shoes have evolved to suit these environments. This makes the relationship between shoes, climate, comfort, and overall well-being a true "trinity" centered around the feet. Choosing the right footwear for the weather is not just about style; it's also about maintaining foot health, which in turn affects the entire body. The saying "cold starts from the top" isn't just a metaphor—it’s backed by science. Research shows that the feet are closely linked to the mucous membranes of the upper respiratory system. When feet get cold, it can cause blood vessels in the respiratory tract to constrict, slowing down ciliary movement and weakening the body’s ability to fight off viruses. That’s why wearing warm shoes is not only comfortable but also essential for overall health. In northeastern China, where the climate is harsh, Ula shoes have long been a staple. Made from cowhide or suede, these shoes are crafted with a single piece of leather for both the upper and sole, making them durable and suitable for all weather conditions. Filled with processed Uluru grass, they offer warmth and softness, perfect for winter. A pair worn by Emperor Nurhaci of the Qing Dynasty is still preserved in the Shenyang Imperial Palace. As living standards improve, people now pay more attention to the aesthetics of their shoes. But in colder months, prioritizing warmth is key. Opt for fur-lined or cotton shoes, and if you choose leather, go for natural leather, which is more breathable than synthetic alternatives. In regions with heavy rainfall, high-soled and high-heeled shoes have become popular. Venice, known as the "City of Water," has seen women wear elevated shoes to avoid getting their feet wet. Similarly, in China’s Jiangnan Water Towns, high heels were once a common sight. As noted in *Shoes and Socks Discrimination* by Yu Huai, such styles were not only stylish but also practical for avoiding water. However, high heels shouldn’t be worn for extended periods, as they can lead to blisters. For those who love heels, a height of 2 to 3.3 cm is ideal. In summer, especially in the Yangtze River Valley, many outdoor workers prefer open-toed sandals for breathability and cooling. In arid desert areas like the Tarim Basin, where temperatures can soar above 70°C, “Qurarak” shoes made from cowhide and felt are essential for heat protection. While sandals and slippers are convenient, some rubber or plastic varieties may contain chemicals that can cause “cold (tow) shoe dermatitis.” Switching to cloth, wooden, or leather slippers can help alleviate this condition. When choosing shoes, consider the "micro-environment" inside. Ensure there's enough space between your feet and the shoes—about the width of a thumb—to allow for proper airflow and prevent discomfort. In summer, this prevents sweating, while in winter, it avoids poor circulation. Properly fitted shoes ensure full contact with the ground, stimulating the reflex points on the soles, which can benefit overall health. Traditional Chinese medicine practitioners often recommend buying shoes in the late afternoon when feet are most swollen, ensuring the best fit. Other tips for shoe care include repurposing old shoes instead of throwing them away, keeping them ventilated, cleaning matte surfaces properly, pairing them with antibacterial socks, understanding the hidden functions of sports shoe tails, reducing the sound of high heels, choosing safe shoes during pregnancy, dealing with moldy shoes, and being aware of summer footwear dangers.

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