Glute Ham Developer (GHD)The REP Glute Ham Developer (GHD) is made for working the posterior chain muscles glutes, hamstrings, and lower back. Strengthening these muscles has been shown to reduce ACL MCL injuries by helping balance upper leg muscles as we are usually quadricep dominant from squats, running, sports, etc. You can flip over and use it for some targeted abdominal workouts, too! Our GHD includes many advanced features: Band pegs for resistance work. A bearing