The Power of Walking and the Respiratory Defense Line: Essentials of Healthy Footwear and a Complete Guide to the Scientific Prevention and Treatment of Colds and Flu [i]

According to research by the American Podiatric Medical Association, a normal person walks an average of about 8,000 steps a day. The pressure on the feet during walking is roughly equal to the body weight, and during running, it reaches 3 to 4 times the body weight [i]. Ill-fitting shoes are one of the main causes of foot problems [i]. Pointed shoes, with their narrow forefoot, force the forefoot into a confined space, easily leading to bunions [i]. Wearing unsuitable shoes can cause corns, cysts, plantar fasciitis, and even ankle, knee, hip, and back problems [i]. When walking in shoes that are too small or too tight, the feet tire quickly, and the neurons controlling the feet-specifically, the corresponding areas of the lower back-also become fatigued, affecting internal organs [i]. Key points for healthy footwear: First, the size must be appropriate; the shoe length should be about 2 cm longer than the actual length of the foot [i]. The tightness of the shoe should be appropriate; adjusting with shoelaces is preferable [i]. The shoe material should be breathable; cloth shoes are the most breathable, and genuine leather shoes are best [i]. Hard soles are a major contributing factor to foot problems. When buying shoes, it's best to bend the sole slightly; the more flexible and elastic the sole, the more comfortable it is [i]. Overweight people should wear soft shoes, as hard shoes increase the burden on the ankle and metatarsophalangeal joints [i]. Elderly people should wear soft shoes with a heel, ideally about 2 cm higher than the forefoot, and the sole should have anti-slip ripples [i]. It's not advisable to wear sneakers all day; sneakers have hard soles and poor breathability, which can easily lead to fungal growth and athlete's foot [i]. Colds and influenza are two different diseases [i]. A cold is the common cold, caused by changes in the surrounding environment and decreased immunity; it has no seasonality and a transmission rate of only 10% [i]. Influenza is the flu, caused by acute influenza virus infection; it has a seasonal onset, rapid spread, and a transmission rate of up to 50% [i]. A common cold usually begins with a sore throat, followed by a runny nose and nasal congestion, and a cough usually appears after 4 to 5 days. Adults generally do not develop a fever [i]. Flu symptoms include sore throat, high fever, headache, muscle aches, and runny nose [i]. Clinically, body temperature is often used to distinguish between the flu and the common cold; the common cold rarely exceeds 38.5 degrees Celsius [i]. If you experience difficulty breathing, chest pain, persistent fever, severe headache, or severe vomiting, please see a doctor [i]. Preventive measures include: washing your hands frequently to kill cold viruses; using a tissue or sneezing or coughing in an empty space; healthy adults should drink 8 glasses of water a day; and taking a sauna twice a week can reduce the chances of catching a cold [i]. Quitting smoking is crucial for respiratory protection; one cigarette can paralyze the cilia in the trachea for 30 to 40 minutes [i]. There are four common misconceptions about dealing with colds: First, indiscriminate use of antibiotics. Antibacterial drugs are ineffective against viral colds and can even lead to drug resistance[i]; second, enduring the cold without seeing a doctor, which can cause complications, especially for men with underlying medical conditions[i]; third, exercising during a cold, as strenuous exercise can lead to immunosuppression within 24 hours, potentially causing a minor cold to develop into myocarditis or pneumonia[i]; and fourth, indiscriminate use of intravenous infusions, as the risk of medication entering the bloodstream is greater than that of oral administration[i]. If symptoms persist for more than a week after catching a cold, or if a high fever persists despite using symptomatic medication, you should seek immediate medical attention[i].