Abstract: The invention relates to a plant and method for the treatment of whole muscle meat, wherein the proposed plant includes a brine injection apparatus (1) with a conveyor device (10); three successive injector heads (20), each provided with a plurality of injector needles (21) connected to pressurized brine supply devices (30); one of said injector heads being connected to a first pressurized brine supply device (31), being independent from the remaining injector heads (20); and said plant also including at least one massage application apparatus (2) including a rotary drum (40) of between 140 cm and 210 cm for loading the whole muscle meat after injection thereof, operated at between 14 and 20 revolutions per minute, obtaining an increase in weight of the whole muscle meat greater than 220%.