Core Strengthening After Stroke

Why the trunk decides so much

When families think about stroke recovery, they think about the arm and the leg. The trunk gets less attention, yet it sits underneath almost everything. An arm cannot reach well if the body it is attached to is wobbling. A leg cannot step cleanly if the pelvis drops to one side. Standing up from a chair needs the trunk to lean forward and then straighten at exactly the right moment.

After a stroke, the trunk muscles on the weak side often switch on late or weakly. The body compensates by leaning, holding on, or stiffening. These shortcuts get people through the day, but they use energy and limit progress. Training the trunk gives the arms and legs a stable base to work from, which is why we often include it even when the family's main worry is walking.

What poor trunk control looks like at home

You may already recognise some of these. The person slowly slides down and sideways in a chair or wheelchair, and has to be hauled back up several times an hour. They lean towards the weak side and need a pillow wedged beside them. At meals they keep the strong hand on the table for support, so they eat with difficulty. Reaching for the TV remote on the side table makes them topple. Standing up takes several rocking attempts. Each of these is partly a trunk problem.

Starting in bed

For people who spend much of the day lying down, trunk work starts on the bed. These are examples of what a physiotherapist might choose; they are always selected and dosed after assessment, and adapted as the person improves.

Pelvic tilts: lying on the back with knees bent and feet flat, the person gently flattens the lower back into the mattress by tightening the stomach, then relaxes. The movement is small. A helper may need to steady the weak knee. Our pelvic tilt guide shows the starting position.

Knee rocking: in the same position, both knees are lowered slowly a little to one side and brought back to the middle, then to the other side. This works the side trunk muscles and loosens the lower back. The weak knee often needs support so it doesn't flop.

Rolling: practising rolling onto each side, led by the head and shoulders turning, with the knees following. Rolling is a real-life skill (it's how people get out of bed) and good trunk exercise at the same time. See rolling practice. How the person lies between sessions matters too, which is covered in positioning a stroke patient in bed.

Core strengthening exercises for stroke patients in sitting

Sitting is where trunk training does most of its work. The person sits on a firm surface (the edge of a firm bed or a chair without arms placed against a wall) with feet flat on the floor and weight on both buttocks. A soft mattress is not suitable, because it gives way.

• Sitting tall: lift through the top of the head, shoulders level, hands resting on the thighs rather than gripping the edge. Hold, relax, repeat.
• Side shifts: slowly move weight onto one buttock, letting the opposite side lengthen, then back to the middle and across.
• Forward lean: hinge forward from the hips with a straight back as if about to stand up, then return upright.
• Turning and passing: turn the upper body to pass an object from one hand to the other or to a person sitting beside, keeping the hips still.

These overlap with sitting and standing balance work, and the difference is mostly emphasis: here the focus is on the trunk muscles doing the work cleanly, while balance training adds more challenge to staying upright. A stable trunk in sitting is often the point where practice with the weak arm starts to pay off, because the strong hand no longer needs to hold the bed.

Standing with the trunk in mind

In standing, trunk work becomes part of function. Sit-to-stand is the obvious one: feet back, lean forward until the nose is roughly over the toes, then push up and straighten the trunk at the top rather than throwing the body upright. Standing at a counter and reaching forward, sideways and slightly behind challenges the trunk to keep the body over the feet. Wall slides and standing side bends may be added later. The core strengthening exercise page shows several of the standing options in more detail.

Why sit-ups and crunches are not the answer

Families sometimes start sit-ups because that's what core exercise means in a gym. After a stroke they're usually a poor choice. People tend to hold their breath and strain, which pushes up blood pressure. They pull on the neck with the hands. They train the trunk to curl forward, when what the person needs is to sit tall and stay upright while moving. And the weak side simply gets left behind while the strong side does the lifting. Leave sit-ups out unless your physiotherapist specifically adds a modified version.

How trunk work fits long-term goals for stroke patients

Core exercise is a means, not an end. Long-term goals for stroke patients are usually about things like sitting at the dining table through a whole meal, dressing while sitting on the edge of the bed, standing to brush teeth at the basin, or getting in and out of the car for a family visit. Trunk work earns its place when it moves the person towards one of those.

This is how a CVA patient exercise plan should be written: start from the goal, work out which part of the trunk control is missing, and choose exercises that build exactly that. The page on setting stroke rehabilitation goals shows how these goals are agreed with the family. Trunk work also sits inside the wider home exercise programme after stroke.

Safety rules for trunk exercises

Breathe out during the effort and never hold the breath. Stop and rest if the person becomes dizzy, breathless, pale or sweaty, or if the back or shoulder becomes painful. Keep the weak arm supported throughout, and never let a helper pull on it to sit the person up. If there is any new sudden weakness, slurred speech or facial droop, stop and call 112 or 108 for an ambulance immediately.

If trunk control is not improving, or the person keeps leaning however much they practise, ask for a review. Stroke physiotherapy looks at whether the problem is strength, sensation, attention or something like pusher behaviour, and the stroke recovery overview explains how these pieces fit together.

Frequently asked questions