Open ten programs from ten different coaches and you'll find the letters "RDL" in most of them.
You'll also find that they don't all mean the same movement.
One coach's RDL is a soft-knee hip hinge with a big posterior-chain stretch.
Another's is nearly straight-legged.
A third uses "RDL" and "SLDL" interchangeably, as if they're the same exercise wearing two hats.
They aren't. And the fact that we've let the name go fuzzy is a bigger problem than it looks — because in a well-built system, the name isn't a label you slap on after the fact. The name is the prescription.
If the name is ambiguous, the prescription is ambiguous, and the athlete downstream is guessing.
The problem: a name that hides the mechanics
Here's the trap with a name like "Romanian deadlift." It's a proper noun.
It tells you the exercise has a history and a heritage, but it tells you nothing about what the body is actually doing.
You cannot look at the letters R-D-L and reconstruct the movement. Is the knee bent or straight? How much? Where's the load? What's the intended range? The name is a container with the contents hidden.
So coaches fill in the blanks from memory, and everyone's memory is slightly different.
The program says "RDL 3×8" and four athletes do four different hinges.
The one whose version drifts toward a stiff-legged pattern loads their hamstrings and low back in a way the coach never intended. Nobody did anything wrong — the name failed. It didn't carry the prescription.
This is the exact failure the Patel Training System's naming taxonomy is built to eliminate.
The framework: Setup → Equipment → Surface → Position → Grip → Direction
In PTS, every exercise is named by walking the same fields in the same order, including only the fields that actually change the movement: Setup → Equipment → Surface → Position → Grip → Direction.
The name is built to describe the mechanics, so anyone reading the program can reproduce the exact movement without guessing.
No country names.
No proper nouns.
No heritage — just the movement.
Under this system, the hinge isn't one blurry thing called "RDL." The movement map splits the hinge cleanly into two mechanically distinct patterns:
- Straight-leg hinge (SLDL) — the knee stays effectively fixed and near-extension; the movement happens almost entirely at the hip. Longer hamstring lever, different loading, different intent.
- Bent-leg hinge — meaningful knee flexion shares the load between hip and knee; a different exercise with a different stimulus, even though it lives in the same family.
That distinction isn't pedantic. It's the difference between two loading patterns with different lever arms, different tissue demands, and different reasons for being in the program.
When you write "SLDL," you've specified the straight-leg pattern — the name carries the mechanics. When you write "RDL," you've named a country and left the knee angle up to interpretation.
The knee angle changes the whole prescription
This is where the RDL/SLDL blur stops being academic and starts changing what an athlete's tissue actually experiences. Knee angle isn't a cosmetic detail on a hinge — it's the variable that decides which tissues take the load and how much lever they work against.
Push the knees toward extension and you lengthen the hamstring lever. The straight-leg pattern biases a long, loaded stretch through the hamstrings and demands more from the athlete's ability to control a hinge at end range with a stiff posterior chain. Allow meaningful knee flexion and you shorten that lever, share the load between hip and knee, and change both the stretch and the low-back demand.
Same family, genuinely different exercise — different enough that prescribing one when you meant the other can be the difference between a productive stimulus and a strained hamstring on an athlete who was already tight.
So when a program says "RDL" and leaves the knee angle to interpretation, it isn't leaving a stylistic choice open. It's leaving the single variable that most defines the loading up to whoever happens to be reading. That's not a naming quibble. It's an un-prescribed dose. A coach who would never write "squat, some weight, a few reps" will happily write "RDL" and consider the movement fully specified — when in fact they've named the family and skipped the mechanic that matters most.
Why this isn't just semantics
The pushback is predictable: "everyone knows what an RDL is, this is splitting hairs."
But two things break that argument.
First, everyone doesn't know — that's the whole point.
If the name genuinely carried a single unambiguous movement, coaches wouldn't have to demo it every time, and two athletes reading the same program wouldn't produce two different hinges. The demo exists because the name failed to carry the prescription.
Second — and this is the deeper reason PTS refuses proper nouns entirely — a name built from mechanics scales. "SLDL" tells you the position. Add the other fields and the movement gets more precise, not more confusing: a DB Staggered SLDL tells you the equipment (dumbbell), the position (staggered stance), and the pattern (straight-leg hinge) in three words, and any coach anywhere reconstructs the identical movement.
Try that with a proper noun. "Romanian deadlift, but staggered, with dumbbells" is a name fighting its own origin. The taxonomy name is a set of instructions; the proper-noun name is a piece of trivia.
Where this fits in PTS
Naming lives in Pillar 6 — Movement — as the language layer that holds the entire system together. It's the last discipline in the M.A.P.P.S. operating system for a reason: once you've mapped the movement, assessed it, prescribed the variables, and planned the progression, the name is what lets you communicate all of it in a single precise string. Every coach, every athlete, every program means the same thing by the same words. That's not a stylistic preference. It's what makes a system a system instead of a folder of everyone's personal shorthand.
SLDL, not RDL. Belly Push, not Pallof. RFE split squat, not Bulgarian. Not because the old names are offensive — because the new ones actually tell you what to do.
The name is the smallest piece of a much bigger system. Naming is one discipline inside M.A.P.P.S. — the movement operating system that runs from assessment through prescription, progression, and programming. See how the whole system fits together inside the Pro and Elite memberships. Explore membership
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