Trunk Control Test: How to Assess Trunk Control in Rehabilitation

The trunk is the link that connects everything: without good control from the center of the body, any movement of the arms or legs has to "compensate" from somewhere. The trunk control test evaluates exactly this basic capacity, and although it originated in neurological rehabilitation, its logic is perfectly useful for any general functional assessment.

What does this test measure?

The trunk control test assesses the ability to control trunk position during postural changes and basic movements, without compensating with the arms or legs. In its original version (used in stroke rehabilitation), it includes tasks like rolling in bed, moving from lying to sitting, and maintaining seated balance.

In a training or sports rehabilitation context, it's adapted to more functional tasks: keeping the trunk stable during limb movements, controlled postural transitions, and resistance to unwanted rotation or flexion.

Equipment needed

• A treatment table or elevated surface (for the lying-to-sitting transfer versions)
• Floor space with a mat
• Optional: an elastic band or light medicine ball for more dynamic versions (perturbation resistance)

Step-by-step protocol

Classic version (transfer-oriented):

1. Roll toward the affected/non-dominant side: from lying on their back, ask them to roll to one side without using their arms
2. Roll to the other side: repeat toward the opposite side
3. Move from lying to sitting: from lying down, have them sit up at the edge of the table without using their arms for support
4. Sitting balance: seated at the edge of the table, with no foot or hand support, for 30 seconds

Functional version (sport/training-oriented):

1. Plank or quadruped position
2. Ask for arm/leg movements (for example, "bird dog": extend an arm and the opposite leg), observing whether the trunk stays stable or rotates/drops to one side
3. Repeat with light resistance (elastic band) to increase the demand

Common mistakes

• Allowing arm compensations during the transfers (defeats the purpose of the test)
• Not observing movement quality, only whether the task is completed
• Applying the classic neurological rehab version to athletic populations without adapting it (it's not sensitive enough to detect subtle deficits in athletes)

How to interpret the result

Classic version (item scoring):

Score	Meaning
0	Unable to perform the task without help
12	Able, but with an abnormal pattern (clear compensations)
25	Able to perform the task normally

The maximum total score for the classic trunk control test is 100 points (4 items x 25). Functional version (qualitative criteria):

Observation	Interpretation
Trunk remains stable throughout the movement	Good control
Slight rotation or drop to one side at the end of the range	Monitor, possible weakness of obliques/lateral core
Clear loss of position or need to "compensate" with another body part	Significant trunk control deficit, prioritize stability work before progressing

Relationship with other tests

Trunk control is the foundation on which other, more complex patterns are built:

• Gait analysis test — lack of trunk rotation while walking is often related to poor control
• Rotational stability test — assesses trunk rotational control more specifically in cross-body patterns

Track your progress with Movalytics

Trunk control improves progressively with training, but it can be hard to "see" session by session. With Movalytics you can record the result of this test (score or qualitative level) at each assessment and review progress alongside the rest of the athlete's or patient's data, helping you decide when to progress core exercise difficulty.

Frequently asked questions

Is this test only for neurological patients? The original version was developed for that context, but the logic of assessing trunk control without compensations is perfectly applicable, in an adapted version, to athletic and general populations. How does it relate to "the core" everyone talks about? The "core" isn't just the abs: it includes all the muscles that stabilize the spine and pelvis. This test is a practical way to see how that system works during movement, not just in static exercises like the plank. How often should it be repeated? In rehabilitation processes, every 2-4 weeks is usually reasonable to track progress. In general assessments, every 8-12 weeks is sufficient.