How many reps or how long should a beginner do the seated flutter kick for?

Start with 2 to 3 sets of 20 to 30 seconds of steady fluttering, bending the knees slightly if the lower back wants to round before time is up. Work toward a straighter leg and a longer hold over time rather than jumping straight to both at once.

What can I use instead of a bench for the seated flutter kick?

The edge of a sturdy chair or a step works equally well as a bench, as long as you can grip it securely beside your hips. Without anything to sit on, a floor-based flutter kick lying on your back trains the same lower-ab pattern instead.

What does the seated flutter kick train, and when should I skip it?

It's a beginner-friendly lower-ab burnout that works well at the end of a core circuit since the bench takes balance out of the equation. Skip it, or bend the knees more, if your lower back rounds almost immediately, since that means the abs aren't yet strong enough to hold the leaned-back position on their own.

Beginner

Seated Flutter Kick

Sitting on the end of a bench and leaning back puts the lower abs on tension before you even start kicking, then the alternating flutter keeps them loaded the whole set. Holding the bench for balance lets you focus purely on the leg action and the braced trunk lean. It is an easy-to-set-up option that works well as a burnout at the end of a core circuit.

Equipment: Bench
Body part: Abs
Type: Strength
Browse by muscle: Lower Rectus Abdominals
Browse by movement: Core Brace

How to do it

1
Sit on the end of a flat bench and grip the edges beside your hips.
2
Lean your torso back to roughly forty-five degrees and extend your legs out front.
3
Lift both feet off the floor so the abs take the tension.
4
Flutter the legs up and down in short alternating kicks.
5
Keep the torso still and the core braced throughout.
6
Breathe steadily and stop when the lower back wants to round or the legs drop.

Tips

Keep a slight brace so the lean comes from the abs, not a slumped back.
Make the kicks small and quick rather than large and slow.
Extend the legs straighter to make it harder or bend the knees to ease it.

Variations

Common mistakes

The torso rocks back and forth with each kick instead of staying fixed at one lean angle, adding motion that isn't part of the flutter.
The hands grip the bench edges so hard that the shoulders shrug up toward the ears, adding tension somewhere that isn't part of the exercise.
The feet drift lower toward the floor as fatigue builds instead of holding a steady height, quietly making the exercise easier rep by rep.
The breath gets held through the harder stretch of the set instead of continuing steadily, adding fatigue that has nothing to do with the abs.
Continuing the flutter well after the lower back starts to round, instead of stopping right at that point, trades ab work for lower-back strain.

Frequently asked

How many reps or how long should a beginner do the seated flutter kick for?: Start with 2 to 3 sets of 20 to 30 seconds of steady fluttering, bending the knees slightly if the lower back wants to round before time is up. Work toward a straighter leg and a longer hold over time rather than jumping straight to both at once.
What can I use instead of a bench for the seated flutter kick?: The edge of a sturdy chair or a step works equally well as a bench, as long as you can grip it securely beside your hips. Without anything to sit on, a floor-based flutter kick lying on your back trains the same lower-ab pattern instead.
What does the seated flutter kick train, and when should I skip it?: It's a beginner-friendly lower-ab burnout that works well at the end of a core circuit since the bench takes balance out of the equation. Skip it, or bend the knees more, if your lower back rounds almost immediately, since that means the abs aren't yet strong enough to hold the leaned-back position on their own.

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