A
dumbbell that can respond to exercise status and play music by which a user can clearly understand the exercise status with the
dumbbell when using the
dumbbell, includes a sensor unit for sensing a movement of the dumbbell, and a
control circuit containing a micro processor, a display unit, a trumpet, and a plurality of press buttons. The micro processor receives a
signal of exercising, performs calculation or summation to
time duration, number of times, and
energy consumption of a continuous exercise, and outputs the outcomes through the display unit, based on settings of the press buttons. Voice and music generation circuits, installed inside the micro processor, can also receive a
signal of exercising including number of times and
time duration of a continuous exercise, output a related voice or music in a
rhythm through the trumpet based on the settings of the press buttons.