Exercise Ball Pull-In
From a push-up position with your shins on a stability ball, you pull the knees toward the chest and roll the ball back out. Every rep starts from a plank you must hold with straight arms while your legs move on a surface that will roll in any direction, so the abs fight both flexion and the ball's tendency to wander sideways.
Own the movement
Set up first, then execute. Every cue below is something you can check on your next set.
Before the first rep
- Kneel with the ball behind you, hands on the floor a little wider than shoulder-width, then walk your shins up onto it.
- Set the ball under your shins, not your ankles — shins give a broader, calmer contact point while you learn.
- Stack your shoulders directly over your wrists and push the floor away so your upper back is not sagging between the blades.
- Squeeze your glutes and tuck the pelvis slightly so your body makes one straight line from heels to head.
- Do a five-second static hold in that position before the first rep. If you cannot hold it, that hold is the exercise for now.
Every rep
Breathing & tempo — Exhale as you pull the knees in, inhale as the ball rolls out — but keep the trunk braced through the inhale rather than letting the belly balloon. One second in, one second pause, three seconds out.
Sets, reps & load
Where to start, and what to change when it stops being hard.
Bodyweight only, and the progression is leverage rather than weight. In order: shins on the ball, then feet on the ball, then a longer pause at full extension, then a single-leg version with one foot hovering. If a set of 10 is easy, move the contact point toward your toes before you add reps.
What goes wrong
The errors that show up most often, and the cue that fixes each one.
Cut the range: roll the ball out only as far as you can keep the glutes squeezed and the pelvis tucked, then extend an inch further each week as the position holds.
Initiate every rep by tucking the tailbone under, then let the knees follow. If your lower back stays arched through the pull, you are training hip flexors only.
Slow down and press both shins evenly into the ball. Set your hands slightly wider for a broader base until the tracking is straight.
Reset before each set with the shoulders stacked over the wrists, and actively push the floor away throughout. A collapsed shoulder position turns this into a wrist test.
Pump it firm. A soft ball sinks under your shins, kills the roll and lets the whole exercise become a static hold.
Why bother
Two demands run at once. Pulling the knees in trains hip flexion with the abs curling the pelvis; holding the extended position resists the hips sagging into extension. The out-phase is the harder of the two, and it is where the rectus abdominis and the deep trunk actually earn their keep.
A ball beats a slider or a suspension trainer here on one specific count: it can roll sideways as well as forwards, so your obliques have to keep the ball tracking straight down the midline. That is a small but real addition, and it is why people who are strong on ab wheels still shake on their first set of these.
Where it fits
Late in the session, two or three times a week, 3 sets of 10-15. It carries over well to anything requiring a rigid trunk with the shoulders loaded — push-ups, overhead pressing, handstand work. Do not stack it in the same session as rollouts; both are anti-extension and the second one just borrows fatigue from the first.
If this one isn't it
No kit, too hard, or too easy — here's where to go instead.
Same job, different kit
Start here instead
Asked and answered
Should my hips pike up or stay flat as I pull in?
Pike up. Some coaches cue a flat back through the tuck, but keeping the hips down turns the movement into pure hip flexion. Letting the hips rise as the knees come in is what puts the abs through a full range, and the pike position at the top is where the contraction is strongest.
Is this better than an ab wheel rollout?
They overlap heavily, and neither is clearly better. The rollout loads a longer, more brutal extension; the ball pull-in adds a lateral stability demand and is easier to regress by shortening the roll. Pick one per session — running both is duplicated work.
I cannot get my shins onto the ball without it rolling away. How do I start?
Put the ball against a wall or a rack upright the first few times so it has nowhere to go, kneel with it behind you, walk your hands out into a plank and then drag one shin up at a time. Once you can get into position reliably, move away from the wall — the entry is part of the skill. A firmer ball also rolls less on the way in than a soft one.
My wrists hurt in the plank position. What can I do?
Grip a pair of dumbbells or push-up handles so your wrists stay neutral instead of extended. Also check your shoulders are stacked over your hands — drifting forward loads the wrists far more than the position itself does.