Abstract: The inventive rowing machine detects angular velocity of a pair of oars pulled by an exerciser to move a moving image appearing on a CRT display on the basis of the detection output while controlling the display to change the direction of movement of the moving image in response to pulling of one of the pair of oars when the moving image on the CRT display threatens to run against an obstacle image. Further, physiological condition of the exerciser is detected by the physiological condition detector to reduce the resistance force against rotation of the pair of oars by loading device in response to detection of small reserve strength of the exerciser with respect to the loading device, and to increase the resistance force against rotation of the pair of oars by loading device in respone to detection of large reserve strength of the exerciser with respect to the loading device.

Abstract: An apparatus for communication of instructing information comprises a transmitter (1), a receiver (2) and a data setting portion (5). A random access memory (22) of the transmitter (1) is in advance stored with a plurality of pieces of instructing data and any one of the pieces of instructing data, as stored, is read out and is displayed by a display (13). Any one of the pieces of instructing data is selected by a selection key (12) and the address data corresponding to the instructing data as selected is transmitted by the transmitter (18). On the other hand, the receiver (3) receives the transmitted address data. The receiver (3) is provided with a random access memory (37) for storing the instructing data as is similar to that of the transmitter (1). The corresponding instructing data is read from the random access memory (37) as a function of the received address data and the instructing information is reproduced as a speech sound by means of a speech synthesizing circuit (39).