Barbell Pin Good Morning is an intermediate barbell exercise for the primary: hamstrings, with the glutes secondary: erector spinae (lower back) and core (abdominals) assisting. Most lifters train it for 3 to 4 sets of 5 to 8 reps.
This exercise is performed by setting a barbell on safety pins in a rack at about hip height and lifting it onto the upper back. From a standing position, the lifter hinges at the hips, lowering the torso forward with a slight knee bend, then returns to standing under control.
Program 3 to 4 sets of 5 to 8 reps as an accessory after squats or deadlifts, resting 2 minutes, because its purpose is hamstring, glute and spinal erector strength in the hinge pattern. The pins let you take the bar at hip height without a heavy walkout, so it also works well as the first hinge exercise on a lighter day.
Set the bar across the upper traps, not the neck, pull the elbows down to lock it in place and keep the shins vertical throughout. Start with the empty 20 kg bar for a few sessions, then add 2.5 to 5 kg per week while the back stays flat at the bottom. The most common fault is the bar rolling up onto the neck as the torso drops, which rounds the upper back. Fix it by pulling the bar hard into the traps with the lats and keeping the chest proud as you hinge.
Both train the hinge, but the good morning puts the load on the back so the erectors work much harder and the weight must stay far lighter. Romanian deadlifts are easier to load heavy and safer for beginners; good mornings suit lifters who want stronger backs for squats.
Most lifters work between 30 and 50 percent of their squat for sets of 5 to 8. A 100 kg squatter starting at 40 kg is typical, and anything over 60 percent usually breaks the hinge.
They strengthen the lower back when the spine stays neutral and the load is modest. Injuries come from rounding under weights that are too heavy, so progress slowly and stop the set when the back starts to bend.
Log your barbell pin good morning sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.