Core activation: how to do it, muscles worked and variations

Exercises that activate the deep abdomen and pelvis.

Main muscles: Transversus abdominis, Rectus abdominis, Hamstrings
Secondary muscles: Quadriceps, Iliopsoas, Gluteus maximus, Multifidus
Equipment: Bodyweight
Variations: 5

Image: start and end of the movement.

All 5 variations

Heel slides

Alternating heel slides lying on your back while keeping the pelvis stable, useful in knee and core rehabilitation.

Form. Lie with your knees bent and a neutral lower back, slide one heel out until the leg is extended without the pelvis moving and bend it again; alternate.

Common mistake. Arching your back as you extend, moving your pelvis, or doing it quickly.

Hamstrings, Transversus abdominis · Bodyweight

Lying heel taps

Lying with hips and knees at 90°, one foot lowers until the heel taps the floor and you alternate, controlling the pelvis.

Form. Lying with your lower back in gentle contact with the floor and your legs in tabletop, lower one leg without changing the knee angle until the heel taps the floor and return; alternate.

Common mistake. Arching the lower back as you lower, straightening the knee, going fast, or dropping the leg without control.

Rectus abdominis, Transversus abdominis · Bodyweight

Supine pelvic tilt

Gentle pelvic rocking lying on your back that teaches control of the lower back and ab activation.

Form. Lie with your knees bent, flatten your lower back into the floor by tilting the pelvis backward as you exhale and return to neutral as you inhale.

Common mistake. Lifting the glutes off the floor, pushing with the legs, or holding your breath.

Rectus abdominis, Transversus abdominis · Bodyweight

Seated transversus abdominis activation

Transversus abdominis contraction while seated, drawing the navel in without moving the pelvis; useful to learn it off the floor.

Form. Sit tall with your feet planted and your hands on your abdomen; exhale and gently draw your navel toward your spine without collapsing your chest or moving your pelvis, keep breathing and release.

Common mistake. Holding your breath, rounding your back, squeezing your glutes, or pulling the abdomen in so hard that you lose your posture.

Transversus abdominis · Bodyweight

Transversus abdominis activation

Sustained contraction that draws the navel in without moving the pelvis, a base for stabilizing the lower back.

Form. Lie down with your knees bent, exhale and gently draw your navel toward your spine without flattening your back or holding your breath; keep breathing normally.

Common mistake. Sucking the belly in while holding your breath, moving the pelvis, or tensing the neck and shoulders.

Transversus abdominis · Bodyweight

The muscles listed are an editorial reference, not a measurement. Adjust the range and the load to what feels comfortable.

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