What we need, who cannot escape from daily fatigue, is exercise for physical strength, not exercise for body shape.
Baek Gwan-jang, a YouTuber and coach at 'Strength School', explains what physical strength is, which we vaguely think of, and teaches step-by-step exercise methods that will help you increase your physical strength and fully enjoy your daily life.
Especially for busy modern people, we suggest ways to exercise efficiently without spending too much time.
Tips such as how to not give up in the middle and how to avoid injury are useful not only for beginners but also for those who regularly go to the gym.

If you subtract 8 hours of sleep from 24 hours a day, there are 16 hours left.
Will you live a life where you barely manage to get through an eight-hour workday and waste the remaining eight hours? Or will you build your stamina and become someone who utilizes those eight hours more efficiently after work? I believe this book will provide the answer.

--- From "The difference in physical strength is the difference in life"

There are hundreds of exercises in this world.
I need to think carefully about the purpose of my exercise.
Some exercises may be for fun, while others may be for body shaping.
If the purpose of exercise is to improve physical strength, you must do exercises that increase physical strength.
Of course, no matter what kind of exercise you do, your stamina can increase 'as a side effect'.
Because it's better than doing nothing.
However, people with poor physical condition and busy schedules do not have much free time.
Wouldn't it be much more efficient to start exercising 'for the purpose of improving physical strength' right away?
--- From "The Meaning of Physical Strength We Misunderstood"

The fact that it is a full-body workout also means that it is highly practical.
Let's consider a situation where we are returning home with a shopping basket.
Is your body fixed somewhere, like when you're doing machine exercise? No.
Can a shopping cart be lifted only at a certain angle, like a machine? No, it isn't.
Holding a shopping cart is similar to holding a dumbbell.
That is, every movement we do in our daily lives requires strength from our entire body.
The same thing happens when you lift a shopping cart or a heavy object from the floor.
That is why I say that when exercising, it is best to use free weights, which are most similar to our daily lives.
--- From "The Advantages of Free Weights"

Exercise is like driving.
Many people drive, but not everyone who drives for a long time has the driving skills of a race car driver.
To achieve that level of driving skill, you must continue conscious driving practice throughout your life.
The same goes for exercise.
If you want to build the stamina you need without getting injured, you just need to practice the postures as much as you can.
But if you want to be better at sports than anyone else, you have to practice conscious posture for a lifetime.
Just like a car racer practices driving all his life.
Personally, I recommend continuing to practice your posture consciously.
Because exercise becomes more fun when my skills improve.
If you can make exercise fun, you can continue it for a lifetime.

--- From "Exercise Level Theory"

If you lift weights too quickly when you have poor flexibility, you can injure your shoulders, back, and knees.
So, should I stretch? I don't think so.
Personally, I don't recommend stretching to office workers.
The stiffness of office workers is a problem caused by weakened body strength.
The muscles around the core, hips, and shoulder blades are all weak, resulting in reduced flexibility.
What we need to do at this time is not stretching, but exercise.
You should first strengthen the muscles around your core, hips, and shoulder blades by doing proper warm-up exercises and practicing using those muscles.
Then, your flexibility will naturally improve and you will not get injured when exercising.

--- From "Why Should I Do Warm-Ups?"

Beginners are especially confused by what health YouTubers say.
They say, “When you feel like you can’t do it, you have to do ‘one more.’”
“I have to overcome my limitations,” he says.
All the beginners who believed those words and pushed on ended up getting hurt and going to the hospital.
The few who survived that hell became 'One More Musae' and are pushing beginners into injury.
People believe that the more exercise they do, the better.
It is natural for a student who studies hard to get first place, so I think the same thing will happen in sports.
But that's not the case.
People who have studied a lot can do a lot.
For someone who is just starting to study, it is difficult to study properly for even 10 minutes.
The same goes for exercise.
If you try to exercise a lot from the beginning, you will only end up with back pain.

--- From "The 'feeling of exercising' is not the goal"