Your core muscles help strengthen and stabilize your spine and pelvis, which is why developing a powerful core is the first step to making your whole body stronger. Start firming up your core with these gentle Pilates-based exercises, which will give you a solid foundation for all other movements. Perform 15 repetitions of each exercise, most days of the week. (Get a flat belly in just 10 minutes a day with our reader-tested exercise plan!)

Pelvic Bowl

Pelvic bowl
Brook Benten

Lie flat on back with knees bent and feet gripping floor, arms facing down at sides. Raise right hipbone as high as you can toward ceiling. Hold momentarily. Slowly shift and raise left hipbone. Gently sway from right to left, as if you have a bowl of soup between your hip bones and you're gently rocking it without spilling. Counting right and left as 1 rep, perform 15 repetitions.

Pelvic Tilts

Pelvic tilts
Brook Benten

Lie flat on back with knees bent and feet gripping floor. Lift hips up toward ceiling in bridge position, and place thumbs on ribcage with middle fingers on hipbones. Tilt pelvis toward ground, expanding distance between fingers and thumbs. Next, tilt pelvis upward, decreasing distance between fingers and thumbs. The two movements from downward to upward should complete 1 breath cycle. Perform 15 cycles.

MORE: The No Squats Belly, Butt, and Thighs Workout

Spinal Impressions

Spinal impressions
Brook Benten

Sit upright with arms out in front of shoulders, elbows slightly bent. Round back softly, and slowly roll backward, imprinting lower back (lumbar spine) then mid-back (thoracic spine), and lastly upper back (cervical spine) down into cushioned mat. Once rounded all the way down and head and neck rest on mat, grab behind hamstrings to assist yourself back to upright seated position. Perform 15 repetitions. (Here are 6 Pilates-inspired moves to flatten your belly fast.)

Modified Hundreds

Modified hundreds
Brook Benten

Lie flat on back with arms at sides and knees bent to 90 degrees, hovering knees directly over hips and shins parallel to ground. Engage abs to lift head, neck, and shoulders off floor. Lift arms, depress shoulders away from ears, and reach fingertips away from you. Begin pulsing arms down and up. Complete 5 pulses on an inhale, then 5 pulses on an exhale. Perform 3 breath cycles like this.

MORE: 8 Most Effective Exercises For Weight Loss

Cat/Cow

Cat/cow
Brook Benten

Start on all fours on mat with knees hips-width apart and hands directly beneath shoulders. Exhale and round back toward ceiling like a cat, head drooping down. Pull navel in toward spine. Hold momentarily. Inhale and drop belly down toward floor, lifting head high. Allow ribcage to expand and chest to stretch. Hold. Perform 15 cycles.