Trunk Muscle Activation and Stability in Rehabilitation Exercises

The trunk muscles form a coordinated network of local segmental stabilisers and global torque producers that maintain spinal stiffness, control load transfer and support functional movement. Rehabilitation exercises targeting this system combine isometric holds, dynamic tasks and neuromuscular control strategies to retrain muscle coordination, alleviate low back pain and enhance performance. Electromyographic analysis has revealed how alterations in posture, support surface or neuromuscular instruction shift activation among the rectus abdominis, internal and external obliques, transversus abdominis, erector spinae, multifidus and gluteal muscles. Recent advances emphasise quantitative load modulation, selective engagement of deep stabilisers via abdominal hollowing and bracing, and the integration of suspension or robotic assistance. Such interventions translate biomechanical insights into practical protocols, demonstrating global relevance for chronic pain management, athletic conditioning, fall prevention and occupational health.

Research from Nature Portfolio

An innovative exercise device permitting lumbar stabilisation under controlled pressure was evaluated in a non-randomised clinical trial of patients with chronic low back pain. Over a twelve-week sitting programme, participants using the device exhibited greater improvements in abdominal trunk muscle strength, pain reduction, physical function and quality of life compared with a stretching-only control group. These results support the role of device-enabled stabilisation exercises in enhancing core strength and functional outcomes in chronic low back pain rehabilitation.

Trunk Muscle Activation and Stability in Rehabilitation Exercises publication trend

The graph below shows the total number of articles in trunk muscle activation and stability in rehabilitation exercises across all publications each year (not limited to Nature Index journals).

Technical terms

Electromyography (EMG): Measurement of the electrical signals produced by muscle fibres during contraction to assess activation patterns.

Isometric contraction: Muscle generates force without a change in length, commonly used to enhance spinal stability.

Lumbar stabilisation: Strategies to control and support the lower spine through coordinated activation of trunk muscles.

Abdominal hollowing: Drawing the navel towards the spine to activate deep core stabilisers, particularly the transversus abdominis.

Abdominal bracing: Co-contraction of all abdominal muscles to stiffen the trunk without drawing the abdomen in.

Bridging exercise: A rehabilitation movement in which the hips are lifted from the ground in supine or prone position to engage trunk and hip muscles.

References

1. Efficacy of abdominal trunk muscles-strengthening exercise using an innovative device in treating chronic low back pain: a controlled clinical trial. Scientific Reports (2020).
2. Selective load control of lumbar muscles in robot-assisted isometric lumbar stabilization exercise. Intelligent Service Robotics (2024).
3. Effects of Ankle Position While Performing One- and Two-Leg Floor Bridging Exercises on Core and Lower Extremity Muscle Recruitment. Bioengineering (2024).
4. Acute Responses of Core Muscle Activity during Bridge Exercises on the Floor vs. the Suspension System. International Journal of Environmental Research and Public Health (2021).