Frog Crunch
Strengthen your rectus abdominis with the Frog Crunch. Lie on your back, knees bent and out, feet together, then crunch up, engaging your core.
- Movement
- Isolation
- Force
- Pull
- Per set
- 1 min
- Rest
- 30s
Free · iPhone only · Available on the App Store
Variations of Frog Crunch
Description
Frog Crunch is a core exercise that targets abs and obliques, improving balance and stability. It involves lying on your back with feet together, bending knees out to sides, and performing a crunch motion.
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How to do Frog Crunch
- 01Setup
Lie supine on the floor, flatten your lower back, and bring the soles of your feet together. Let your knees fall open to the sides in a 'frog' position, and place your hands lightly behind your head or crossed over your chest.
- 02Setup
Engage your core slightly, ensuring your lower back remains pressed into the floor throughout the entire movement to protect your spine.
- 03
Exhale as you slowly curl your head, shoulders, and upper back off the floor, drawing your rib cage towards your pelvis.
- 04
Focus on contracting your rectus abdominis, maintaining the 'frog' leg position with knees wide and feet together.
- 05
Inhale as you slowly and with control lower your upper body back down to the starting position, maintaining core engagement to prevent your back from arching.
Tips
- Maintain the 'frog' leg position throughout the entire movement to maximize adductor engagement and stabilize the lower body, preventing unnecessary movement.
- Focus on initiating the crunch from your core, imagining your belly button pulling towards your spine, rather than pulling with your neck.
- Control both the upward and downward phases of the crunch; avoid using momentum to lift or drop your torso, which reduces muscle activation.
- Keep a slight space (about the size of an apple) between your chin and chest to prevent neck strain, especially if your hands are behind your head.
Common mistakes
- Arching the lower back during the crunch reduces abdominal engagement and can strain the spine; ensure your lower back stays pressed into the floor by actively engaging your core.
- Pulling on the neck with hands behind the head can cause cervical strain; instead, use your abdominal muscles to lift your torso and keep a neutral neck position.
- Rushing the movement and using momentum diminishes muscle activation; perform the crunch slowly and with control, focusing on the mind-muscle connection to target the rectus abdominis effectively.
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What muscles does Frog Crunch work?
Frog Crunch primarily targets Rectus Abdominis. Secondary muscles include Adductor Brevis, Adductor Longus, Obliques, Quadriceps, Sartorius, Tensor Fasciae Latae.
Is Frog Crunch good for beginners?
Frog Crunch is rated intermediate. Beginners can still attempt it with lighter weight and careful form, but it's best to master easier variations first.
What equipment do I need for Frog Crunch?
You need Body weight to perform Frog Crunch. If you don't have this equipment, look for variations that target the same muscles with what you have available.
What are the best tips for Frog Crunch?
Maintain the 'frog' leg position throughout the entire movement to maximize adductor engagement and stabilize the lower body, preventing unnecessary movement. Focus on initiating the crunch from your core, imagining your belly button pulling towards your spine, rather than pulling with your neck. Control both the upward and downward phases of the crunch; avoid using momentum to lift or drop your torso, which reduces muscle activation. Keep a slight space (about the size of an apple) between your chin and chest to prevent neck strain, especially if your hands are behind your head.
What are common mistakes when doing Frog Crunch?
Arching the lower back during the crunch reduces abdominal engagement and can strain the spine; ensure your lower back stays pressed into the floor by actively engaging your core. Pulling on the neck with hands behind the head can cause cervical strain; instead, use your abdominal muscles to lift your torso and keep a neutral neck position. Rushing the movement and using momentum diminishes muscle activation; perform the crunch slowly and with control, focusing on the mind-muscle connection to target the rectus abdominis effectively.
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Free · iPhone only · Available on the App Store