Varicose veins affect roughly 30% of the global population, presenting as swollen, twisted, and bulging pathways right beneath the skin's surface. Measuring at least 3 millimetres in diameter, these prominent blue or purple vessels are most commonly found in the calves, ankles, and feet, where the simple daily pressures of standing and walking place the heaviest burden on our circulatory system. While many people view varicose veins purely as a cosmetic frustration, they matter because they serve as a window into your deep vascular health. Far from being a surface-level flaw, they are frequently the first visible warning sign of a much more serious underlying condition known as Chronic Venous Insufficiency (CVI). To understand why this is a serious condition, it helps to understand why the normal functioning of veins is so critical. (Mal)function of the venous system In a healthy person, the cardiovascular system follows a predictable, highly efficient cycle: The ...

 Smartwatches have evolved from simple timekeeping devices into compact health-monitoring systems that generate data on sleep patterns, energy expenditure, and other physiological metrics. Among their most sought-after features is heart-rate monitoring. While wearable sensors can provide a useful estimate of heart rate after physical activity, can they reliably assess cardiovascular health? How accurately do they reflect an individual’s cardiac status? Understanding your Heart Rate Heart rate is the number of times the heart beats within a certain time period, usually a minute. For a healthy adult who is at rest, the heart rate is normally between 60 and 100 beats per minute (bpm). Tachycardia Our heart rate adjusts to the body’s changing metabolic demands throughout the day, whether climbing stairs or engaging in strenuous exercise. Such activity-related fluctuations are physiological and generally normal. During these episodes, you may temporarily experience tachycardia...