Which factor could lead to an increased risk of blood clots?

Prolonged immobility is a significant risk factor for the formation of blood clots, particularly in the deep veins of the legs, a condition known as deep vein thrombosis (DVT). When an individual remains in one position for an extended period, such as during long flights, bed rest, or sedentary lifestyle choices, blood flow decreases significantly in the affected areas. This sluggish blood flow can lead to clotting factors becoming activated, increasing the likelihood of clot formation.

In contrast, regular exercise promotes circulation and prevents blood from pooling in the veins, while staying hydrated helps maintain optimal blood viscosity and flow. A healthy diet supports overall cardiovascular health and contributes to normal blood flow as well. Therefore, prolonged immobility stands out as the factor that directly increases the risk of blood clots due to its adverse effect on venous circulation.