The GHD is an excellent piece of equipment to have in your arsenal since it allows you to perform a variety of workouts that are tough to duplicate without the glute-ham development or other commercial hamstring devices.u003cbru003eu003cbru003eA glute ham development machine allows you to strengthen your hamstrings and glutes while doing sit-ups and back extensions at the same time. While improving the strength of these body parts without a glute-ham raise machine is conceivable, getting results that are comparable to those obtained with a GHD machine is difficult.