
Leg flutters work the lower abdominals while keeping the legs straight.
Lying on your back, hands under your glutes or by your sides, lift your straight legs a few centimeters off the floor.
Perform small, alternating up-and-down flutters, fast and controlled, for the planned duration.
The lower back stays pressed against the floor. If it arches off, raise your legs a little.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry