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(1) Purposeful exercises have well-defined specific goals.This book was written by two authors, one is a psychologist and the other is a science writer. More than 10 years ago, we began to often discuss the theme of outstanding people and "deliberate practice", and five years ago we began to seriously write books on this theme. During that time, the book slowly took shape in the ideological collision between the two of us, so that it is now difficult for us to distinguish which part of the book was put forward by whom. All we know is that it is much better and completely different for the two of us to write this book together than for us to write it alone.Of course, if the average trainer is not heavy, it is not a big problem to choose which shoes. However, with the improvement of results, the problem of shoes should be considered.How do these two pair of socks look听到陈启的回答，吕馨顿时露出笑容，说道：你可不能拖欠我稿费，要知道这些钱我都是要存起来，当做以后的嫁妆。(未完待续……) show_style();。So as to assist in supporting the shooting trunk. In this way, the tension of the erector spinae group on the lower back can be reduced, because this part of the supporting force is completely generated by the contraction of the erector spinae group on the lower back without using the weightlifting belt.