Barbell Sitted Alternate Leg Raise

The Barbell Sitted Alternate Leg Raise is a compound movement that trains the core with help from obliques and quadriceps. This guide covers the setup, the execution, the mistakes worth fixing early, and how to program it.

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Updated 2026-10-20 · Written by the Metal Strength coaching team from the movement itself, and reviewed against the exercise library.

Barbell Sitted Alternate Leg Raise, performed through a full range of motion.

Raising the legs against gravity trains the core through a long range while the grip and shoulders work to keep you stable. It is one of the hardest core movements to do honestly, and one of the most effective when you do.

Who it is for. Best once you can control a hollow position. Start with knees bent and progress toward straight legs.

Muscles worked

The prime mover here is the core, with obliques and quadriceps assisting — which is why this movement earns its place as more than a single-muscle exercise.

Barbell Sitted Alternate Leg Raise — Muscles worked: Core, Obliques, Quadriceps (Back)

How to do it

Hang or brace in position with your shoulders active — pulled down, not loose in the sockets.
Set your pelvis so your lower back is flat rather than arched.
Take the swing out of the body before the first rep.
Raise your legs by curling your pelvis toward your ribs, not just by bending at the hips.
Come up to a full contraction of the core, and pause there for a beat.
Lower slowly under control, stopping before your lower back arches away from neutral.

Breathing. Breathe out as you raise the legs, in as you lower under control.

Form cues that matter

Curl the pelvis up — hip flexion alone is not an ab exercise.
No swinging; if you are swinging, bend the knees more.
Control the way down, every rep.
Swinging the legs up with momentum
Only bending at the hips and never curling the pelvis

Common mistakes

The mistake	Do this instead
Swinging the legs up with momentum	Bend the knees to shorten the lever and slow every rep down.
Only bending at the hips and never curling the pelvis	Think about bringing your hips to your ribs at the top of each rep.
Letting the lower back arch as the legs drop	Stop the descent where you can still hold a flat back and build the range from there.

What makes this variation different

The Barbell Sitted Alternate Leg Raise is a specific version of this movement, and the details in its name change how it should be performed.

A barbell lets you load more weight than anything else and add it in small increments, which makes it the best tool for long-term strength progress. It also forces both sides to work together, so a stronger side can cover for a weaker one.
Seated removes the legs and the lower back from the equation, so the target muscle cannot be helped by a drive from the floor. It makes the movement stricter and usually means a little less weight.
Alternating sides lets each arm or leg rest while the other works, so the set lasts longer and the grip or the heart rate becomes less of a limit. Keep the non-working side still rather than letting it swing along.

Sets, reps and rest

Goal	Sets	Reps	Rest
Strength	3-5	6-10	60-90 s
Muscle growth	3-4	10-15	60-90 s
Endurance	2-3	15-25	60-90 s

6-14Weekly sets
2-1-2Tempo
60-90 sRest

How to progress

Add reps before you add weight. Stay at the same load until you reach the top of your rep range on every set, then increase the resistance and drop back to the bottom of the range. The Barbell Sitted Alternate Leg Raise responds better to accumulated quality reps than to heavy jumps.

Variations and alternatives

If you do not have the equipment, or you simply want to rotate the stimulus, these 8 movements train the core in a similar way.

Hanging Oblique Knee Raise — Bodyweight
Alternate Leg Raise — Bodyweight
Alternate Lying Floor Leg Raise — Bodyweight
Cable Hanging Leg Raise — Cable
Cable Reverse Crunch — Cable
Captains Chair Straight Leg Raise — Bodyweight
Decline Bent Leg Reverse Crunch — Bodyweight
Flutter Kicks (Version 2) — Bodyweight

Safety

Key takeaways

Curl the pelvis up — hip flexion alone is not an ab exercise.
No swinging; if you are swinging, bend the knees more.
Work in the 10-15 rep range for muscle growth, leaving a rep or two in reserve on most sets.
Full range of motion on the Barbell Sitted Alternate Leg Raise matters more than the weight on it.
Progress gradually and keep technique identical as the load goes up.

Go deeper

FAQ

What muscles does the Barbell Sitted Alternate Leg Raise work?

It works the core as the prime mover, with obliques and quadriceps assisting. The midsection also works throughout to keep you stable.

How many sets and reps should I do on the Barbell Sitted Alternate Leg Raise?

Three to four working sets of 10-15 reps suits most people training for muscle growth, leaving one or two reps in reserve. Across all the exercises that train this muscle, 6-14 hard sets a week is a productive range.

Is the Barbell Sitted Alternate Leg Raise good for beginners?

Yes, provided you start light enough to own the technique. Spend the first few weeks on the movement itself with a load you could do several more reps with, and add weight only once the pattern is automatic.

What can I do instead of the Barbell Sitted Alternate Leg Raise?

Hanging Oblique Knee Raise, Alternate Leg Raise and Alternate Lying Floor Leg Raise all train the core in a similar way, so any of them works as a substitute when the equipment is taken or you want to rotate the stimulus.

What equipment do I need for the Barbell Sitted Alternate Leg Raise?

This version uses a barbell. The pattern matters more than the tool, though — the alternatives above cover the same movement with whatever you have available.

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