The invention relates to the field of fitness equipment, in particular to a magnetoresistor for fitness equipment, which comprises a mounting seat, an electromagnetic wheel
assembly and an
electromagnet, the electromagnetic wheel
assembly and the
electromagnet are arranged on the mounting seat, the electromagnetic wheel
assembly comprises a conductive wheel and a magnetic conducting part, the conductive wheel comprises a wheel disc and a
brake edge which is coaxially arranged with the conductive wheel and is perpendicular to the disc surface of the wheel disc, the
electromagnet and the magnetic conducting part are arranged on the two sides of the
brake edge respectively and are oppositely arranged, a channel for the
brake edge to pass through is arranged between the electromagnet and the magnetic conducting part, and an anti-contact gap is formed between the brake edge and the electromagnet and between the brake edge and the magnetic conducting part. Through the arrangement of the electromagnetic wheel assembly, electric conduction and magnetic conduction are separated, the conductive wheel does not conduct
magnetism and only conducts
electricity, the magnetic conducting part can conduct
magnetism and
electricity, when the conductive wheel rotates, a magnetizer does not rotate along with the conductive wheel, the magnetizer and the electromagnet are detachably and fixedly arranged on an installation base to form a stable
magnetic field, and the conductive wheel rotates to
cut magnetic lines of force to generate
Lorentz force so as to form magnetic resistance.