core
Flutter kicks
Lower-ab endurance.
▶ Watch the full demo in the app3-second preview. The full demo with coach cues is in the FirstGym app.
How to do it
- Lie on your back, legs straight, hands under your hips.
- Lift your legs slightly and alternate small up-down kicks.
- Keep your lower back pressed down.
Beginner tips
- Don't let your back arch.
- Small, controlled kicks.
- Breathe steadily.
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