Crunch (on Stability Ball, Arms Straight)
Learn how to do the Crunch (on Stability Ball, Arms Straight) with proper form and technique. This stability ball exercise primarily targets your Abs, with secondary emphasis on Hip Flexors.
How to Do the Crunch (on Stability Ball, Arms Straight)
Follow these steps to perform the Crunch (on Stability Ball, Arms Straight) with correct form:
- 1Sit on the stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
- 2Lie back on the ball until your lower back is supported and your upper body is parallel to the floor.
- 3Place your hands behind your head or cross them over your chest.
- 4Engage your abs and lift your upper body off the ball, curling your shoulders towards your hips.
- 5Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
- 6Repeat for the desired number of repetitions.
Crunch (on Stability Ball, Arms Straight) Muscles Worked
Primary
Secondary
Exercise Details
- Equipment
- stability ball
- Body Part
- waist
- Category
- Extended
Recovery & Training Frequency
- Recommended Recovery Time
- 2–3 days
- Weekly Frequency
- 2–3 sessions per week
- Why
- Medium-sized muscles like the deltoids and traps recover well with 48–72 h between targeted sessions. Higher training frequency (3 ×/week) is viable when volume per session is modest.
Sets & Reps by Goal
Strength
- Sets
- 3–4
- Reps
- 5–8
- Rest
- 90–120 s
Isolation movements can be trained with moderate loads for strength, though peak strength expression is secondary to compound lifts.
Hypertrophy
- Sets
- 3–5
- Reps
- 10–20
- Rest
- 45–90 s
Isolation exercises shine in the 10–20 rep range with a 2-second eccentric. Taking the final set close to failure drives maximum hypertrophic stimulus.
Endurance
- Sets
- 2–4
- Reps
- 20–30
- Rest
- 20–45 s
Light-load, high-rep isolation work is useful for rehab, joint health, and pump-focused training.
Which Workout Splits Include Crunch (on Stability Ball, Arms Straight)?
Based on the muscles this exercise targets, it fits naturally into these training splits and day types:
Full Body
Any session
Bro Split
Abs/Core Day
Not sure which split is right for you? Cora builds personalised training plans that match your schedule and goals. Learn more about progressive overload.
Related Exercises
Frequently Asked Questions
What muscles does the Crunch (on Stability Ball, Arms Straight) work?
The Crunch (on Stability Ball, Arms Straight) primarily targets your Abs. Secondary muscles worked include Hip Flexors. This makes it an effective exercise for developing your waist.
What equipment do I need for the Crunch (on Stability Ball, Arms Straight)?
The Crunch (on Stability Ball, Arms Straight) requires stability ball. Make sure your equipment is properly set up and you have enough space to perform the movement with full range of motion.
How do I perform the Crunch (on Stability Ball, Arms Straight) with proper form?
Start by Sit on the stability ball with your feet flat on the ground and your knees bent at a 90-degree angle. Lie back on the ball until your lower back is supported and your upper body is parallel to the floor. Place your hands behind your head or cross them over your chest. Focus on controlled movement throughout the entire range of motion. See the full step-by-step instructions above for complete form guidance.
How often should I do the Crunch (on Stability Ball, Arms Straight)?
For most people, allow 2–3 days between sessions targeting the same muscle group. That translates to 2–3 sessions per week. Medium-sized muscles like the deltoids and traps recover well with 48–72 h between targeted sessions. Higher training frequency (3 ×/week) is viable when volume per session is modest.
What are the best sets and reps for the Crunch (on Stability Ball, Arms Straight)?
It depends on your goal. For strength: 3–4 sets of 5–8 with 90–120 s rest. For hypertrophy (muscle growth): 3–5 sets of 10–20 with 45–90 s rest. For endurance: 2–4 sets of 20–30 with 20–45 s rest.
Which workout splits is the Crunch (on Stability Ball, Arms Straight) best for?
The Crunch (on Stability Ball, Arms Straight) fits well into the following training splits: Full Body (Any session), Bro Split (Abs/Core Day). It is classified as a core movement.
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