Trenabol® works by mimicking natural anabolic hormones in the body, such as testosterone and human growth hormone (HGH). Athletes have successfully utilized the Trenabol® to increase muscle growth and strength. Trenabol generates large amounts of muscle tissue and increases protein synthesis in the body. These effects help produce size, strength and endurance as well. Usually you would use Trenabol® during a bulking phase in your training, however due to the versatile nature of this prohormone it can also be used during the cutting. Trenabol® is a 19-nor prohormone, which means that the Androstenolone molecule in the 19th position has been modified to create a new compound.