Preface1

I was delighted to learn in reading this book,“Physical Activity, Diet and Obesity”that my favorite doctoral student Dr.Shou He Yan has had courage to lead and realized so complex a work.As we well know,obesity is a very grave problem of public health,especially as it can lead to a great variety of complicated diseases. This is a major risk not only in Europe but also in whole world.

The special quality of this book is reports the culmination of years of obesity research up to the present covering both theory and practical applications.In theory includes epidemiology, physiology, pathology, etiology and biochemistry. The practical aspects of the problem include nutrition,therapy,exercise education,and their corresponding practice in sports and diet.This ambitions undertaking covers a largefield,but I am not surprised that Shou He has been the one to carry this project to fruition. She has the capacity,experience,courage and that makes her stand out among the Ph.D students I have had known over the years.

Shou He's passion has been shared by her co-worker as I have been able to observe as this book has taken shape. I hope that all their efforts are rewarded through acceptance of their theory and practical application. It has been both a pleasure and honor to write this foreword. I have learned much during 25 years collaborations with Shou He.

Prof.émérite Marcel VANBELLE

Université Catholique de Louvain（UCL）

March, 2009, Belgium