45 Degree Back Extension

45 Degree Back Extension trains the posterior chain through controlled hip and trunk extension on a supported station.

Primary muscle

Back

Primary musclesErector spinae, Gluteus maximus

Secondary musclesHamstrings, Hip adductors

Equipment

Bodyweight

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Set up for 45 Degree Back Extension

Prepare the training area

Use a level, non-slip surface and clear enough room for the complete movement.
Place any required mat, bench, or stable hand support before taking the starting position.

Position yourself for 45 Degree Back Extension

Set the thigh pad just below the hip crease, secure the feet, and begin with the torso in line with the legs and the spine long.
Set the pad below the hip crease so the hips can hinge freely without pressure on the abdomen or lower ribs.

Choose and verify the starting level

Choose the easiest 45 Degree Back Extension variation that preserves the required body line and full controlled range; use elevation, support, or assistance as needed.
Perform one slow rehearsal repetition and change the setup if the equipment shifts, the range causes pain, or the target position cannot be maintained.

How to perform 45 Degree Back Extension

Follow the sequence in order, paying attention to the starting position, movement path, and finish described in each step.

For 45 Degree Back Extension, set the pad below the hip crease, secure the feet, and begin with a long spine and the arms crossed or held close to the body.
Brace lightly and keep the neck in line with the spine before lowering.
Lower by hinging at the hips, allowing the torso to travel only as far as you can keep it controlled.
Drive the hips into the pad and contract the glutes and hamstrings to raise the torso.
Finish in line with the legs without leaning into an exaggerated lower-back arch, then lower smoothly.

Common 45 Degree Back Extension mistakes

These are the form changes most likely to move work away from the target muscles or make the repetition harder to control.

Hyperextending the spine

Finish with the torso in line with the legs instead of lifting beyond neutral.

Pad placed too high

Keep the pad below the hip crease so the hips can hinge freely.

Rounding abruptly

Lower through a controlled hip hinge rather than collapsing the chest toward the floor.

Using momentum

Pause and move smoothly instead of bouncing through the bottom.

When to modify or choose another exercise

Reduce the resistance, range, lever length, or balance demand if 45 Degree Back Extension cannot be completed without compensation.
Stop when the exercise produces sharp, catching, radiating, or increasing joint pain rather than the expected muscular effort.
Shorten the hold, range, or lever if the lower back or neck takes over; choose a different core pattern if symptoms continue.

Programming guide

How to use 45 Degree Back Extension in a training program

Program 45 Degree Back Extension after the session's main bilateral lift or use it as the lead exercise when unilateral control or back development is the main goal.

Where it fits in a session

Use 45 Degree Back Extension after larger compound movements, or earlier only when its target action is the workout's main priority.

How often to use it

Use one to three times per week and count the work alongside compound exercises that train the same muscles.

Starting rep ranges by goal

Goal	Sets	Reps or time	Rest	Effort and execution
Strength accessory	2–4	6–10	75–150 sec	Leave 2–3 controlled reps in reserve
Muscle growth	2–4	8–15	60–120 sec	Usually 1–3 clean reps in reserve
Local endurance	2–3	12–20	45–90 sec	Stop before range or joint position changes

How to progress it

Add controlled repetitions within the selected range before increasing resistance. For unilateral work, progress each side according to the weaker technically sound performance.

Pairing and sequencing

Superset with a non-competing accessory when both exercises can keep their intended joint paths.
Do not add isolation volume without counting the work already received from compound lifts.

Coach's notes

Use 2–4 sets of 6–12 repetitions, leaving enough reserve to keep every repetition balanced.
Rest 60–120 seconds between sets, with more recovery when load or balance makes the exercise demanding.
Progress the controlled range and repetitions before load; keep left/right set and rep targets equal unless a qualified coach has a reason not to.

Scale the movement