A protective sports garment, of the type formed like trousers with an upper waist (2) for passing the torso of the user and two longer or shorter legs or lower tubular extensions (3) for introducing and housing the legs and more specifically the thighs, where the garment (1) is made of an elastic fabric both in the longitudinal direction and in the transverse direction, and comprises in the rear part of the garment (1) flat longitudinal reinforcements (4) intended to act on the hamstring muscles and extending from the waist (2) towards the lower area, said reinforcements (4) having considerable longitudinal elasticity, but reduced or nil transverse elasticity.
