The "fitness" gurus have a habit of saying nonsense. They would like you to believe that if only you do something-rather a few minutes a day, which is, or course, easy, you'll get fast results. In such cases, they are lying through their teeth.
But such nonsensical claims have a valid point. That is, people are generally lazy. They don't like to spend effort. They like exercises which are:
- quick,
- easy,
- which bring results fast.
Which is a sheer nonsense. But it gives rise to a proliferation of strange practices. Such as "yin yoga", where you don't spend efforts, because stretching cold muscles is all you have to do to be fit, in spite of all the rules of sports medicine. (By a strange coincidence, the founder of this "yoga" is Pauli Zink, who proclaimed himself to be a Monkey (Kung-fu) King a while ago. Which encountered some serious fraud accusations. )
These natural human tendencies (leading to unhealthy desires) caused one kettlebell aficionado David Chester to joke that heroin is the best for those who want to loose wait fast. Because it's quick to take. And it's easy. And it brings results fast. Very efficient.
If, however, you want to get some fitness results in a natural way, you have to work on it. And the more, the better. Here is a study (if you need one) which showed that extra training was giving rise to health improvements even for runners covering 50 miles a week.