O’LIVE PRO SERIES GHD Disc load Ref. PL35300.00 X Muscle works O’Live Fitness GHD is fully adjustable and comes primed to remain stable while generating maximum power output. It is a comprehensive tool for trunk stabilization and strengthening of the hamstrings and glutes.GHD stands for Glute Ham Developer and it was invented to perform glute and hamstring exercises, especially the glute-ham raise, that helps develop strength in the posterior chain while helping the development of stability of the spine and pelvis.