Pedal assisted bicycle and method of controlling the pedal assisted bicycle

The present invention refers to a pedal assisted bicycle (1) which comprises a first (5') and a second (5") wheels; a pedaling assembly (6) mechanically decoupled from said firs (5') and second (5") wheels by which an user can supply a pedaling power (Wped); an electric motor (8) mechanically coupled to at least one of said first (5') and second (5") wheels capable of taking a motor power (Wmot); a generator device (9) adapted to generate a generator device electric power (Wgen) from said pedaling power (Wped), arranged in an energy exchange relationship with the pedaling assembly (6) and the electric motor (8); an energy storage device (10) arranged in an energy exchange relationship with the electric motor (8) and with the generator device (9); a control system (11) comprising a module for controlling the power (Wgen) required to the generator device to be supplied to the electric motor (8) and/or to the storage device (10); a heartbeat sensor (26) adapted to generate a signal representing heartbeat. The module for controlling the electric power required to the generator device (Wgen) is operatively connected to the heartbeat sensor (26) and is configured in order to determine the electric power required to the generator device (Wgen) as function of the signal representing the heartbeat. The present invention refers also to a method for controlling the pedal assisted bicycle.