Increased perceived effort: Running in hot weather can feel more challenging due to the physiological stress placed on your body.You may feel fatigued, experience reduced endurance, and struggle to maintain your usual pace. Decreased performance: The combination of increased heart rate, dehydration, and elevated core body temperature can lead to decreased performance.These conditions can occur when your body’s cooling mechanisms are overwhelmed, and you fail to adequately replace fluids and electrolytes. Risk of heat-related illnesses: Running in the heat increases the risk of heat-related illnesses such as heat cramps, heat exhaustion, and heatstroke.Your body tries to dissipate this heat through sweating and increased blood flow to the skin’s surface. Increased core body temperature: Running generates heat, and in hot conditions, your core body temperature can rise significantly.This can affect the delivery of oxygen and nutrients to your muscles, making your run feel more challenging. Decreased blood volume: Sweating causes a loss of plasma volume in the blood, reducing the overall blood volume.Dehydration can impair performance, reduce endurance, and even pose a risk to your health. Dehydration risk: Sweating leads to fluid loss, which can quickly deplete your body’s water and electrolyte levels.Your heart rate rises to pump more blood to the skin’s surface for cooling, as well as to the working muscles. Elevated heart rate: Running in the heat places additional stress on your cardiovascular system.As the ambient temperature rises, your sweat glands become more active, leading to increased perspiration. Increased sweat production: Your body produces sweat to cool down.Here’s what happens to your body when you run in hot weather: When running in the heat, your body undergoes several physiological changes to regulate its temperature and cope with the increased demand. If you enjoy running then you’ll always have to contend with a variety of weather, and one that can be the most challenging to run in, for both seasoned and novice runners is hot weather.
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