Flutter Kicks
Flutter Kicks are performed lying on your back with legs extended, alternating small up-and-down kicks while keeping your core braced. The key is pressing your lower back into the floor and maintaining steady tension through the abs and hip flexors without letting momentum take over. Proper breathing technique during this kind of sustained core effort helps maintain intra-abdominal pressure and spinal stability (Hackett & Chow, 2013).
The movement builds muscular endurance in the core and hip flexors through continuous, low-amplitude contractions. Keeping the kicks small and controlled forces the deep stabilizers of the trunk to work constantly, which carries over to better performance in other exercises and daily activities. Stronger hip flexors also contribute to more powerful lower-body movement patterns (McCullough et al., 2009).
Flutter Kicks fit well into core-focused workouts, warm-ups, or conditioning circuits. To make them easier, bend your knees slightly or raise your legs higher. To increase the challenge, lower your legs closer to the floor while maintaining the same controlled rhythm. When programmed consistently as part of a broader training plan, exercises like these support long-term improvements in body composition and core strength (Wewege et al., 2022).
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Technique and form
How to perform the Flutter Kicks
- Lie on your back with your legs extended and arms placed alongside your body, palms pressing into the floor for stability.
- Engage your core muscles by drawing your navel toward your spine and pressing your lower back firmly into the floor.
- Raise both legs about 6 inches off the ground while maintaining the posterior pelvic tilt position to protect your lower back.
- Lift your head and shoulder blades slightly off the floor, keeping your neck in a neutral position by gazing toward your knees.
- Begin the flutter motion by raising one leg higher while simultaneously lowering the other, keeping both feet off the ground at all times.
- Maintain a small range of motion (4-6 inches between legs) and focus on controlled movements rather than speed or height.
- Breathe normally throughout the exercise, avoiding the tendency to hold your breath as you stabilize your core.
- Continue alternating leg positions in a rhythmic, scissor-like motion while keeping your abdominals engaged and back pressed into the floor.
Important information
- Keep your lower back pressed firmly into the floor throughout the entire exercise to prevent arching and potential strain.
- If you feel any discomfort in your lower back, raise your legs higher off the ground or place your hands underneath your tailbone for additional support.
- Focus on the quality of movement rather than speed; slower, controlled flutter kicks engage the core more effectively.
- For beginners, start with 20-30 seconds and gradually increase duration as your core strength improves.
Common Mistakes: Flutter Kicks
Benefits of the Flutter Kicks
Muscles Worked: Flutter Kicks
The Flutter Kicks is an isolation exercise that focuses your effort on the abdominal muscles. Here's a breakdown of every muscle involved.
Primary muscles
Abs — Your abdominal muscles brace your core and keep your spine safe. These are the main muscle doing the heavy lifting during the Flutter Kicks.
Secondary muscles
Hip Flexors — Your hip flexor muscles lift and control the leg during the movement. While not the main focus, these muscles play an important supporting role.
The Flutter Kicks primarily works 1 muscle with 1 supporting muscle assisting the movement.
FAQ - Flutter Kicks
Flutter Kicks primarily target the lower abdominal muscles, while also engaging the hip flexors, quadriceps, and lower back stabilizers. The continuous motion creates sustained tension in the core, making it particularly effective for developing lower abdominal strength and endurance.
Beginners can perform Flutter Kicks with bent knees or for shorter durations (15-20 seconds). To increase difficulty, extend your legs fully, raise your shoulders off the ground, or add ankle weights for additional resistance.
The most common mistakes include rounding your lower back, rotating your hips instead of keeping them square, rushing through the movement, and not hinging properly at the hips. Focus on maintaining a neutral spine, moving with control, and keeping your standing knee slightly soft rather than locked.
Flutter Kicks can aggravate existing back problems if performed incorrectly. If you have back concerns, start with bent knees, place hands under your glutes for support, and stop if you feel any back pain. Consider consulting a physical therapist before incorporating this exercise.
Include Flutter Kicks 2-3 times weekly as part of your core training, performing 2-3 sets of 30-60 seconds each. Allow 24-48 hours between sessions for muscle recovery, especially if you're targeting the core intensely in your overall program.
Scientific References
Hackett DA, Chow CM · J Strength Cond Res (2013)
Factors affecting flutter kicking speed in women who are competitive and recreational swimmers
McCullough AS, Kraemer WJ, Volek JS, et al. · J Strength Cond Res (2009)
Wewege MA, Desai I, Honey C, et al. · Sports Med (2022)
Sources are peer-reviewed academic publications from PubMed.
Flutter Kicks
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