In the past, going outside naturally led to walking, but now it feels like a "project" that requires special determination and willpower.

However, recent research shows that people who walk continuously for just 15 minutes a day have nearly half the risk of heart disease compared to those who do not, and their mortality rates over several years are also lower. Isn't it surprising that such a small difference can have such a big impact?

The problem is that it's not easy for us to carve out that 15 minutes. I also can't remember the last time I walked for more than 15 minutes.

Walking is said to be the easiest physical activity anyone can do, yet most people do not walk 'enough'.

The official guideline is to walk briskly for more than 150 minutes a week, but the fact that 75-80% of the population does not meet this standard means that walking has effectively become a "rare skill" in today's world.

The researchers then pondered how to make even short movements more effective, and past studies have shown that even small movements like household chores can lead to beneficial changes in the heart if done at a slightly faster pace.

But we can't always run around the house with a vacuum cleaner, so the focus ultimately shifted to "continuous walking time".

The study involved over 30,000 participants, all of whom wore activity trackers for a week. They selected those who reported "not exercising much" and walked less than 8,000 steps a day, dividing them into three groups: those who walked for less than 5 minutes, those who walked for about 10 minutes, and those who walked for more than 15 minutes continuously. They compared their heart disease and mortality rates over a staggering 10 years.

The results showed that the group that walked continuously for 15 minutes was the healthiest and lived the longest. The 10-minute group also showed benefits, while the group that walked for less than 5 minutes performed relatively poorly. Interestingly, even if the total number of steps taken in a day was similar, "how long they walked continuously" made a decisive difference.

In other words, walking 5,000 steps throughout the day has little effect, but if you can walk continuously for just 15 minutes, the body's systems respond differently. This effect was particularly strong for those who usually walk very little.

For someone who walks less than 5,000 steps a day, switching to continuous walking for 10-15 minutes significantly reduces the risk of heart disease and early death. In contrast, those who already walk 8,000 steps a day gain relatively little benefit from adding another 15 minutes.

This means that the less active you are, the greater the value of a single long walk becomes. Ultimately, the key message of this research is simple: "Just walk a little more." But the really important thing is how to put that into practice. In a busy and hectic daily life, finding 15 minutes for continuous walking seems easy yet is quite a challenge.

So perhaps walking is becoming even harder in this era.

However, there is a way. If increasing your total step count feels overwhelming, try to create "10-15 minutes of continuous walking" at least once a day. You can achieve surprisingly significant health benefits with relatively small efforts.

Professor Lee Min-ri from Harvard also states, "No matter how much you move, it has its own significance," while advising to try walking for more than 10 minutes if possible. If just 15 minutes can open the door to consistent walking, isn't it worth trying to walk starting today?