小田原のテニススクールに通っている72才のYさんについて→Yさんにお世話になっております。52才の私とも普通にラリーができます。しかし私が後見人をしていたOさんは同じ72才ですがほとんど動けません、ほぼ寝たきりで散歩もできません。この違いは何か？それは運動習慣だと考えます。20才の時はさほど差のなかったと思われる2人も10年経ち、30年経ち、50年経つと運動習慣のある人と全く運動習慣のない人とではどんどん差が広がったと考えます。
まさにドルコスト平均法で複利の力を使うのか、預金にずっと入れっぱなしなのかの差に似ていると感じました。数年の差は知れているのです、しかし50年の差は大きいと考えます。
About Mr. Y, 72 years old, who attends a tennis school in Odawara → Mr. Y takes care of me. Even though I am 52 years old, I can rally normally. However, Mr. O, who was my guardian, is also 72 years old, but he can hardly move, is almost bedridden, and cannot even take a walk. What is the difference? I think of it as an exercise habit. There may not have been much of a difference between two people when they were 20 years old, but as 10, 30, and 50 years have passed, the gap has widened between people who have a habit of exercising and people who have no habit of exercising at all.
I felt that it was similar to the difference between using the power of compound interest through dollar cost averaging and leaving money in savings all the time. I know there is a difference of a few years, but I think a difference of 50 years is huge.