Starfish Crunch
Work your core from every angle! The Starfish Crunch targets your obliques for a stronger, more sculpted midsection.
The Starfish Crunch mainly works the core, with help from the back. No equipment needed: it uses just your bodyweight.

Optional Equipment

Starfish Crunch Muscles Worked
Primary
Abdominals (rectus abdominis); Obliques
Secondary
Lats (latissimus dorsi); Boxer Muscle (serratus anterior)
Starfish Crunch Variations and Alternatives
How to do the Starfish Crunch
Starfish Crunch Instructions
Starting Position
Lie down flat on your back on the exercise mat.
Extend your arms out to the sides at shoulder height.
Spread your legs apart so your body resembles a starfish shape, keeping your feet slightly off the floor.
Movement
Crunch Phase:
Lift your right arm and your left leg simultaneously toward the center of your body while engaging your core.
Aim to touch your right hand with your left foot.
Keep your head, neck, and lower back pressed into the mat as you lift.
Return Phase:
Slowly lower your right arm and left leg back to the starting position, ensuring control throughout.
Repeat:
Perform 10-15 repetitions on one side, then switch, lifting your left arm and right leg toward the center.
Continue alternating sides for a total of 2-3 sets.
Tips
Keep your movements smooth and controlled to maximize effectiveness and minimize strain.
Focus on engaging your core throughout the exercise.
If you find it challenging to maintain balance, you can rest your feet flat on the ground until you feel comfortable.
Starfish Crunch FAQs
What muscles does the Starfish Crunch work?
The Starfish Crunch mainly works the core, with help from the back. The main muscles are the rectus abdominis and obliques.
What equipment do you need for the Starfish Crunch?
None. The Starfish Crunch is a bodyweight exercise, so you can do it anywhere.
What are some Starfish Crunch variations and alternatives?
Similar exercises include the Dumbbell Single-Arm Starfish Crunch, Dumbbell Starfish Crunch, Leg Extension Star Crunch and Single Starfish Crunch.
Training calculators
Work out the numbers behind your training before your next session.





