The present invention refers to a microcontrolled device for the non-invasive measuring of lactic acid for high-performance cyclists. The device measures the pulse through the mechanical effort and speed of the cyclist using a bike speed meter, then a normalization being performed for obtaining the deflexion point where the pulse and speed curves are separated, various models being used for evaluating the lactate generated by the cyclist. After the processing, the device may display the generated lactate. The system also uses a pulse frequency demodulator and the bike speed meter for measuring the pulse and speed, respectively. The system is implemented with an interface of the bracelet type which is worn in the arm, leg or wrist of the cyclist, or using a sensor for capturing the effort exerted by pulse signals. Finally, the device may display the lactate to the user, also transmitting the information to a training site or a test control central in a wireless form.
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