**Importance of physical activity**
**The London Bus Study** In 1953, *The Lancet* published a groundbreaking study by Dr. Morris, an esteemed epidemiologist. This research provided fascinating insights into the health disparities among London transport workers. Dr. Morris meticulously analyzed the health records of many conductors and drivers employed by the city's iconic double-decker buses. His investigation revealed a striking contrast between the two groups, particularly concerning cardiovascular disease. Conductors, who were required to ascend and descend the bus stairs throughout their shifts, climbed an impressive total of over 700 steps daily. This significant level of physical activity was linked to a dramatic reduction in the risk of cardiovascular issues. In fact, the study found that conductors experienced a 50 percent lower risk of heart disease than their fellow workers in the driver's seat. This pivotal study rapidly gained prominence in the West, sparking a broader public awareness of the essent...