BEIJING, Sept. 15 (Xinhua) -- About 73 percent of Chinese netizens are in sub-healthy state with 70 percent of them suffering from psychological problems, according to a survey conducted by 39.com.

    The survey said 73 percent of the 150,000 respondents have dizzy, insomnia and arthralgic problems and half of them suffer from stomachache from time to time.

    More than 70 percent netizens have suffered amnesia, anxiety and scatterbrained problems, however, 90 percent of them never resort to psychological doctors, the survey showed.

    Surfing on the Internet kills netizens' time for physical exercise. 51.4 percent of the respondents said they spent less than 3 hours every week in taking exercise and 12.5 of them didn't do any exercise in the last half year.

    The Internet also sharply reduces users' time for sleeping. The survey said that 84 percent of them sleep for less than eight hours a day.

    Statistics showed the number of Internet users in China hit an estimated 162 million by the end of this June.

    Sub-healthy state, referred to a functional change without organic pathological process, is a transitional stage between the health and illness.

    Previous report said that the number of Beijingers with sub-healthy conditions accounted for 75.31 percent of the whole population.