Every few months, a new fitness trend cycles through social feeds — cold plunges, zone-2 heart-rate training, hybrid athlete programs. The habit that keeps quietly outperforming most of them in longevity studies is much older: walking.

Large cohort studies now consistently find that adults who accumulate around 7,000 to 10,000 steps per day have meaningfully lower rates of cardiovascular events and all-cause mortality compared to sedentary peers. The benefits appear well before the 10,000-step mark and plateau afterwards.

Walking works partly because it is easy to sustain. It requires no equipment, no recovery day and no gym membership, which makes it one of the few forms of exercise most people can actually do every day for decades.

Structured workouts still have their place — strength training in particular remains important with age. But if you're choosing between one more optimisation and a daily 30-minute walk, the walk is probably the higher-yield decision.