Rounding the lower back
Stop the descent where your back would start to round, even if that's above the knees.
Hinge · Barbell
The Romanian deadlift (RDL) is a hip hinge where you lower a barbell down your thighs with slightly bent knees, then stand back up. It's one of the best hamstring and glute builders and suits anyone who can hold a neutral back.
The hamstrings and glutes extend the hips under a long stretch. The lower and upper back hold the spine neutral, and the grip works hard to hold the bar.
Stop the descent where your back would start to round, even if that's above the knees.
Keep the knee bend small and push the hips back rather than down.
Keep the bar in contact or nearly in contact with your thighs the whole way.
Surpass starts the romanian deadlift at 8–12 reps with about 2 reps in reserve. As a compound lift it usually belongs early in the session, when you are fresh.
Use 6-12 reps and add 5-10 lb when you complete the top of the range with a flat back. Lifting straps are fine if grip limits you before your hamstrings.
Surpass shows what you lifted last time beside a target for this set, and adjusts it from your reps and RIR. Free on iPhone, no account needed.
These train the same main muscles. Swap when the equipment is busy, something hurts, or progress has stalled for several weeks.
The RDL starts from the top, uses lighter loads, and keeps tension on the hamstrings throughout. The conventional deadlift starts from the floor and uses more quads and total load.
Go as low as you can while keeping a flat back, typically somewhere around mid-shin. Range varies with hamstring flexibility.