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Double Crunch

Beginner
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Bodyweight core exercise that combines upper body crunch with lower body lift to target rectus abdominis and hip flexors, building abdominal strength and stability.

About Exercise

Equipment

Body Weight

Difficulty

2/5 • Beginner

Primary Muscle Groups

Abs, Hip Flexors

Popularity Score

7

Goals

Hypertrophy
Stability
Conditioning

Training Style

Calisthenics
Bodybuilding

Setup Requirements

Requires Rack

No

Requires Bench

No

Requires Spotter

No

Space Needed

Small

Noise Level

Low

Muscle Breakdown

Abs

10/10

Rectus Abdominis

Hip Flexors

8/10

Iliopsoas

Obliques

6/10

External Obliques, Internal Obliques

Programming

Typical Rep Range

10-25 reps

Rest Between Sets

30-60 seconds

How to Perform

Lie flat on your back on a mat with knees bent, feet flat on the floor hip-width apart, and hands lightly by your head or crossed over your chest.

  1. Brace your core by drawing your lower ribs toward your pelvis.
  2. Exhale and simultaneously lift your shoulders off the floor while curling your knees toward your chest.
  3. Aim to bring elbows toward knees without fully extending legs.
  4. Squeeze your abs at the top for a brief pause.
  5. Inhale and slowly lower your upper body and extend legs back to start, keeping lower back pressed to the floor.
  6. Repeat for reps without letting momentum take over.

Coaching Tips

Form Cues

  • Engage core first
  • Keep lower back flat
  • Lift with abs, not neck
  • Breathe steadily
  • Control the descent

Breathing

Exhale as you crunch up and squeeze; inhale as you lower back down while keeping your core braced.

Tempo

3-1-2

Range of Motion

Lift shoulders until upper back is off the floor and knees reach hip height, maintaining a neutral spine without arching the lower back.

Safety

Safety Notes

  • Avoid if you have acute lower back or neck pain
  • Consult a doctor for disc issues or herniations
  • Keep movements controlled to prevent strain
  • Do not interlace fingers behind head

Spotting

No spotting needed; perform in a clear space on a soft surface.

Common Mistakes

  • Pulling on neck
  • Arching lower back
  • Using momentum
  • Letting feet swing wildly
  • Incomplete range of motion

When to Avoid

  • Lower back pain
  • Neck strain
  • Disc herniation

Flexibility Needed

  • Adequate trunk flexion
  • Hip flexion mobility

Build Up First

  • Basic core awareness

Also known as

Full Crunch, Combined Crunch

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