I did a GHD sit-up every day for a week — here’s what happened to my abs
Bored of doing sit-ups? Why not mix things up with the GHD sit-up — an intense variation of the well-known abdominal exercise? The GHD sit-up stands for Glute Ham Developer and is actually a piece of gym equipment on which someone can do a sit-up, despite the fact that, as the name suggests, the GHD…