to massage the user on the holding board 211 according to certain predetermined situations the predetermined situations may be but are not limited to the user touching or leaning against the backboard 215 for example when the user touches or leans against the backboard 215 the back massager 222 starts to massage the user the back massager 222 continues to operate even after the user passively remains in position leaning against the backboard 215 the back massager 222 may also start to massage the user when the vibrator 221 transmits a start signal to the back massager 222 once in every predetermined time interval that is the back massager 222 is programmable to achieve the above described functions and characteristics and can be electrically connected to the vibrator 221 the eye massager 224 and the audio player 226 are set on an inner surface of the helmet 34 the eye massager 224 is located at a front side of the helmet 34 the audio player 226 includes at least two loudspeakers 226 a 226 b set beside the eye massager 224 the eye massager 224 massages the eyes of the user when the user 39 s head is inserted into the helmet 34 the audio player 226.