Do you know the doctor who went from being a 'tofu-sal' to an 'iron man'?
The story of an internist who lived a life of isolation from exercise, completing the Ironman, and what happened afterward.

A full-fledged exercise nagging essay that combines medical knowledge with a witty writing style!

In an age where we worry about getting sick if we don't exercise hard.
But the beginning is always scary.
I am dull, have no time, am lazy, and above all, I feel resigned to the thought, 'What can someone like me do?'
This book is a realistic comfort and the most honest motivation for such people.
The author of this book is an internist who is far from being an exercise enthusiast and is often teased as a "tofu fat person."
One day, when I was in middle age, I started running, and from then on, I ran slowly, quietly, and steadily.
After running like that for over 30 years, I have now completed ten Ironmans.
This is a rare essay that balances and enriches personal experience as an athlete with professional expertise as a doctor.

This work is not a book that recites accidental miracles like a broken radio.
Rather, it is a practical essay that shows how a person with an extremely ordinary body and mind overcame the inertia of everyday life and took a step forward.
This book speaks to those who have made up their minds but are hesitating, those who feel the need for health management as they age, and those who want to exercise but put it off.
“Someone like me did it too.
“You can do it too.” A book that makes you laugh lightly and then quietly decide.
Highly recommended for those who need a warm stimulation.
And above all, one word that must not be forgotten.
“Get moving!” You who just read a book and go back to bed, get out there and move your body.
Because the body is the best gift that we have to move.

People say that triathlon is a sport for elite athletes or people with great athletic ability, but in reality, there are more ordinary people like me in the world.
With the know-how accumulated as a doctor who has run the field for decades, “You can do it too.”
I really wanted to convey the message, “Even I, who was a tofu eater, did it!”

--- From "Author Interview"

If you want to walk on your own two feet until the end, and if you want to live a life without relying on others and staying in bed even when you're old, you have to move a lot now to increase the chances of that happening.
The conclusion that exercise is the best way to prevent dementia is a conclusion that was reached through a lot of research.
If you want to keep your mind and body healthy, you need to start now.
Anyone can exercise, and if you do it, you will improve.

--- From "Author Interview"

Just go out and run.
Anything you like, anything that moves your body is fine.
If possible, try something you've never tried before.
As you do it, it gets easier, and you start to want to try something more difficult or longer.
Don't be afraid.
Even running costs almost nothing.
Just get started!
--- From "Author Interview"

Some people ask me what I think about when I run a marathon.
Well, I don't know what to say.
But this time, while running, I found the answer.
To someone who asks that question, you can just ask, “What do you think about as you live?”
Wow, that's a good answer.
--- p.29

And then he spent the whole evening praising the marathon.
It's good for your body, it's good for your mood, it's good for your mind, anyone can do it, just run at your own pace...
He said that everyone should run a marathon at least once in their lifetime, and that it would be an honor for the family if their father and grandfather completed the marathon.
--- p.46

When I run, I see so many people.
I've seen people run with a disability that causes one side of their rib cage to collapse, and others run in wheelchairs because they can't use their legs.
Those who cannot see ahead run with the guide leading them.

--- p.76

The path of disease and the mechanisms by which the body is damaged are complex and multifaceted.
That's why medical school textbooks are thick.
There is a lot to learn and memorize.
There are no rules in illness.
It's arbitrary.
That's why treatment and rehabilitation are difficult.
But the path to health is simple.
--- p.167

This is what I tell my patients every day.
“If you want to live healthy, move.
It's important, so make it a priority and take the time to do it.
Move around and do your job.
If you don't like it, think of it as medicine and move."
--- p.188

The true value of being able to move your body becomes clearer when you are injured or sick.
Today, I also made rounds on patients admitted to a rehabilitation hospital with conditions such as stroke, heart failure, chronic obstructive pulmonary disease, and hip fracture.
These people are hospitalized to practice and train movements such as standing up, sitting in a wheelchair on their own, and going to the bathroom.
These people know firsthand that walking is never a trivial or insignificant thing.
A wise man would act before this day comes.
--- p.206

So I run for fun.
If you enjoy studying, you are successful in that field.
When I was in school, I studied for exams, but as I got older, I really wanted to know and learn, regardless of exams or qualifications, so how much fun it was to read books and study.
Running is the same.
Exercise is only real if it's fun.
It's fun and it makes you healthy, what could be better than that?
--- p.236

The body can be tamed.
The more you do, the more you get.
It's a very predictable and honest investment.
Whether on the treadmill or outside, don't think of it as 'practicing' or 'training'; just enjoy it, just like you wouldn't think of a walk as practice or training.
Then your body will become more fit and you will be able to run farther, longer, and with less effort.
--- p.283

Just as being picky about food is bad for your health, so is exercising.
Let's try an exercise we've never tried before.
You can't live just by exercising every day.
You also need days when you don't exercise.
On days like that, let's just rest and play.
Let's relax without feeling anxious or guilty.
If you feel anxious, it may be a withdrawal symptom.
However, it is good to make moving your body a part of your daily routine and habit.
--- p.328

Time passes steadily.
As the darkness deepens, the road becomes more deserted.
Because there are already many people who have finished the race.
The distance between the runners is getting farther and farther.
Going alone is a marathon, and that is life.

--- p.343