Walking rarely receives the same attention as more structured forms of exercise, yet regular walking is associated with meaningful improvements across a wide range of health measures, cardiovascular fitness, mood, sleep quality, weight management, despite requiring no equipment, no training, and no particular level of existing fitness to begin.
Its accessibility is a significant part of its value: nearly anyone can start walking regardless of age, fitness level, or financial circumstance, which makes it one of the few forms of exercise genuinely available to almost the entire population without any real barrier to entry at all.
Building walking into an existing routine, to work, around a lunch break, after dinner, tends to be far more sustainable than treating it as a separate, dedicated exercise session requiring its own scheduled block of time, which is often the very obstacle that causes more demanding exercise plans to quietly lapse. The difference shows up mostly in hindsight, once enough time has actually passed.