Tuck Up exercise animation (Female)

Tuck Up

Target muscle
—
Equipment
Body weight
Body part
Waist
Type
Strength

The tuck up is a beginner-friendly floor exercise that targets the rectus abdominis while engaging the hip flexors as you bring your knees and torso simultaneously toward each other. Performed on a mat with no equipment needed, it trains core strength and body-awareness in a controlled, low-impact movement that suits early-stage training programs.

How to do the Tuck Up

  1. 1Lie flat on your back on a mat with your legs extended and your arms stretched overhead along the floor.
  2. 2Engage your core by drawing your navel gently toward your spine to protect your lower back.
  3. 3On an exhale, simultaneously lift your upper body and bend your knees, pulling them toward your chest while reaching your hands forward toward your feet.
  4. 4Aim to bring your hands close to your shins and lift your shoulder blades fully off the mat at the top of the movement.
  5. 5Hold the tucked position for a brief pause, keeping tension in your abs throughout.
  6. 6On an inhale, slowly lower your upper body back to the mat while extending your legs, returning to the starting position with control.
  7. 7Reset your arms overhead and repeat for the target number of reps.

Form tips

  • Initiate the movement with your abs contracting first — avoid using momentum or jerking your neck to pull yourself up.
  • Keep your lower back flat against the mat during the return phase; if it arches, slow down the lowering and focus on pressing your spine into the floor.
  • Breathe out as you crunch up and in as you lower — pairing breath with effort keeps your core braced at the right moment.
  • If reaching your shins feels difficult, aim for your knees first and work toward your shins as your flexibility and strength improve.

Common mistakes

  • Using momentum by swinging the arms and legs forcefully, which bypasses the abs and makes the rep feel easier than it is.
  • Pulling on the neck or head when lifting, which strains the cervical spine and shifts effort away from the core.
  • Letting the lower back arch off the mat during the lowering phase, which removes tension from the abs and puts stress on the lumbar spine.
  • Only lifting the head without raising the shoulder blades, which reduces the range of motion and the work the rectus abdominis actually does.
  • Rushing through reps without a controlled descent, which shortens the time under tension and reduces the effectiveness of the exercise.

Frequently asked questions

What muscles does the tuck up work?

The tuck up primarily works the rectus abdominis (the 'six-pack' muscle) through the crunching motion, with the hip flexors assisting as you draw your knees toward your chest.

Is the tuck up good for beginners?

Yes — it requires no equipment, uses a short range of motion, and the tucked knee position reduces the lever arm compared to straight-leg exercises, making it approachable for people new to core training.

How many sets and reps should I do?

For beginners, 2–3 sets of 10–15 reps with a slow, controlled tempo is a good starting point. Increase reps or add sets as the movement becomes easy.

What is the difference between a tuck up and a regular sit-up?

In a standard sit-up your legs stay flat and stationary; in the tuck up both your knees and upper body move simultaneously toward each other, which reduces hip-flexor dominance and keeps more of the work in the abs.

Where should I feel the tuck up?

You should feel the effort primarily in your mid-section — the rectus abdominis from below the chest to the lower abs — and a secondary pull at the front of your hips from the hip flexors.

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