Penguin Crunch Exercise: How to Do Heel Taps Correctly
The Penguin Crunch exercise—also called alternating heel taps—is a simple bodyweight core movement that trains your obliques without equipment. By keeping your shoulders lifted and reaching from side to side, you create continuous tension through the abdominal wall while practicing controlled lateral flexion. It is beginner-friendly, easy to add to a home workout, and useful for athletes who need a stable, responsive core.
What Is the Penguin Crunch Exercise?
The Penguin Crunch gets its name from the short side-to-side motion of your upper body. You lie on your back with your knees bent, lift your shoulder blades slightly, and alternate reaching each hand toward the heel on the same side. Unlike a standard crunch, which mainly curls the torso forward, this variation emphasizes controlled side bending.
You may also hear the movement called heel touches, heel taps, or alternating heel touches. All describe essentially the same exercise. The goal is not to touch your heel at any cost; the goal is to shorten one side of the waist while keeping your hips and feet still.
Muscles Worked
The primary muscles worked during Penguin Crunches are the internal and external obliques, which help bend and rotate the trunk. Your rectus abdominis keeps the shoulders elevated, while the transverse abdominis helps brace the midsection. The hip flexors and muscles around the neck should play only a supporting role when your technique is correct.
Stronger obliques can improve trunk control during running, lifting, throwing, kicking, and martial arts. They also support posture and help transfer force between the upper and lower body. However, no abdominal exercise can selectively burn fat from the waist; visible definition depends on overall training, nutrition, recovery, and body-fat level.
How to Do a Penguin Crunch Correctly
- Set up: Lie faceup on a mat. Bend your knees, place your feet flat and hip-width apart, and position your heels close enough that your fingertips can nearly reach them.
- Brace: Gently draw your ribs toward your hips and press your lower back comfortably toward the floor. Keep your pelvis neutral rather than forcefully tucking it.
- Lift: Raise your head and shoulder blades a few inches. Keep your chin slightly tucked, as if holding a small ball beneath it.
- Reach right: Slide your right hand toward your right heel by bending through the side of your torso. Keep both feet planted and avoid twisting your hips.
- Return: Move through the center without resting your shoulders on the floor.
- Reach left: Slide your left hand toward your left heel with the same controlled motion.
- Continue: Alternate sides at a steady pace. Exhale on each reach and inhale as you pass through the center.
Form cue: Think “rib to hip,” not “hand to heel.” A shorter, controlled reach that comes from your waist is more effective than stretching your arm and losing abdominal tension.
Common Mistakes to Avoid
- Pulling the head forward: Keep your gaze above your knees and maintain space between your chin and chest. Stop if your neck takes over.
- Moving too quickly: Momentum reduces time under tension. Use a smooth two-count rhythm and feel the side of your waist contract.
- Sliding the feet: Plant the entire foot. If your feet move, shorten your range of motion.
- Rocking the hips: The torso should bend laterally while the pelvis remains quiet and level.
- Holding your breath: Breathe continuously. Exhaling during the reach can help deepen the abdominal contraction.
- Chasing the heel: Heel contact is optional. Adjust your foot position or perform a smaller reach instead of straining.
Sets, Reps, and Workout Programming
Count one reach to each side as one rep per side. Choose a range that lets you maintain the shoulder lift and steady breathing from start to finish.
- Beginners: 2–3 sets of 8–12 reps per side.
- Intermediate: 3 sets of 15–20 reps per side.
- Core circuit: 30–40 seconds of controlled repetitions, followed by 20–30 seconds of rest, for 3 rounds.
Train the movement two or three times per week with at least a day between demanding core sessions. Place it after compound lifts or include it in a short circuit with a front plank, bird dog, and side plank. Stop the set when your neck tightens, your feet shift, or you can no longer keep your shoulders elevated with control.
Penguin Crunch Variations
Easier: Head-Supported Heel Taps
Support the back of your head lightly with one hand and perform several reaches with the free arm before switching sides. Do not pull on your neck. You can also rest briefly between repetitions or move your heels closer.
Harder: Slow-Tempo Penguin Crunch
Take two seconds to reach, pause for one second near the heel, and take two seconds to return through center. The longer time under tension increases difficulty without adding weight.
Harder: Extended Heel Reach
Move your feet a little farther away or slightly wider to increase the distance of each reach. Progress gradually and keep your lower back comfortable.
Advanced: Light Weighted Heel Taps
Hold very light dumbbells at your sides only after mastering the bodyweight version. Added load should not encourage swinging, shoulder strain, or a larger range than you can control.
Safety and Modifications
The Penguin Crunch should create muscular fatigue in the abdominals, not sharp pain. If lifting your head causes neck discomfort, rest your head, reduce the set length, or choose a dead bug or side plank instead. If you have an existing back, neck, abdominal, or pelvic-floor condition—or are returning to exercise after pregnancy or surgery—ask a qualified healthcare professional whether this movement is appropriate for you.
Warm up with gentle pelvic tilts, dead bugs, or cat-cow movements. A padded mat can make the position more comfortable, but it should be firm enough that your feet do not slide.
Frequently Asked Questions
Are Penguin Crunches the same as heel taps?
Yes. Most coaches use Penguin Crunches, alternating heel taps, and heel touches for the same side-to-side bodyweight abdominal exercise.
Do Penguin Crunches make your waist smaller?
They strengthen and develop the muscles around your waist, but they cannot spot-reduce body fat. A smaller-looking waist generally requires an appropriate nutrition plan, consistent full-body strength training, and regular activity.
How many Penguin Crunches should I do?
Start with 8–12 controlled reps per side for two or three sets. Add repetitions or slower tempo only when you can keep your feet planted, hips still, and neck relaxed.
Can beginners do Penguin Crunches?
Yes. Beginners can move the heels closer, use a smaller range, or rest the head between reps. Technique and tension matter more than touching the heel.
Build a More Complete Core Routine
Penguin Crunches train lateral flexion, but a balanced core plan should also include anti-extension, anti-rotation, and lateral stability. Pair them with planks, dead bugs, bird dogs, Pallof presses, or side planks. Progress one variable at a time—repetitions, tempo, range, or resistance—and prioritize clean movement.
The Penguin Crunch exercise works best when every reach is deliberate. Keep the shoulders gently lifted, breathe through each repetition, and make the movement come from your obliques. With consistent practice, it can build abdominal endurance and better trunk control for training, sports, and everyday movement.
Follow our Social Media!
