Exercise
ABDOMINAL PENDULUM
Form cues
About
The abdominal pendulum trains the obliques and entire core in the frontal and transverse planes by demanding controlled leg lowering to the sides from a vertical position. The key challenge is maintaining shoulder contact with the floor while the legs resist gravity laterally — a direct measure of lateral core control.
Instructions
Step-by-step technique
Lie on your back with arms extended out to the sides in a T shape, palms flat on the floor.
Raise both legs to 90°, feet together, legs straight.
Slowly lower both legs together to the right side, stopping just before they touch the floor.
Engage your obliques to pull the legs back to the vertical center position.
Without pausing, lower the legs to the left side and return to center.
Continue alternating sides for the prescribed reps, maintaining full shoulder contact with the floor throughout.
Common mistakes
What goes wrong — and why
Shoulders lifting off the floor
As legs lower to the side, the opposite shoulder lifts — indicating the core cannot control the load at this range.
Reduce the range of motion. Only lower legs to 45° until the core is strong enough to control the full side-to-side movement.
Knees bending on the descent
Knees bend to shorten the lever arm and make the movement easier.
Lock the knees and flex the quads before beginning. Place a light resistance band around the ankles as a reminder to keep legs together and straight.
Lowering too fast
Legs crash to the side using gravity rather than a controlled eccentric.
Take 3–4 seconds to lower the legs to each side. Controlled lowering is where the strength adaptation occurs.
Variations · Progressions · Regressions
Adaptations for every level
Bent Knee Pendulum
Perform the same pendulum motion with knees bent at 90° — the shorter lever arm significantly reduces the load on the obliques.
Windshield Wipers
Similar movement performed from a hanging position on a pull-up bar — much higher difficulty as bodyweight hangs from the hands.
Slow Pendulum with 5-Second Lowering
Increase the eccentric tempo to 5 seconds per side, dramatically increasing the time under tension and oblique demand.