To feel weightless it is not necessary to conquer space or keep a severe diet. There is diving to bring you pleasure, help to keep fit and turn you into the explorer of the sea depths. So, if you are ready to experience completely new and unearthly emotions, hold your breath and plunge.
However, before beginning diving lessons you should pass a full medical examination as there are some contraindications to this activity. These contraindications can be temporary, like cold, flu, angina and bronchitis, and permanent, like chronic diseases of internal organs, eyes, ears and nervous system, as well as problems which need surgical interference, like hernia.