Powercore Commercial GHD ( Glute Ham Developer)Powercore Equipment: Commercial GHD (Glute Ham Developer) The Powercore Commercial GHD is an essential piece of equipment for comprehensive core and posterior chain development. Benefits of a GHD include improving strength and stability of areas around the core midsection, including glutes, hamstrings and lower lumbar region. You can do a wide range of exercises such as raises, and GHD sit ups to work many different parts of the lower torso and legs.