Trunk muscle activity during spine stabilization exercises performed in a pool

Area of Science:

• Sports Medicine
• Rehabilitation Science
• Exercise Physiology

Background:

• Low back pain is a prevalent condition affecting many individuals.
• Therapeutic aquatic exercises are commonly prescribed for low back pain management.
• Understanding trunk muscle activation during these exercises is crucial for optimizing treatment.

Purpose of the Study:

• To compare trunk muscle activity levels during various aquatic exercises.
• To identify which aquatic exercises are most effective for engaging core muscles in healthy individuals.

Main Methods:

• A quantitative observational laboratory study was conducted.
• Surface electromyography (EMG) was used to measure activity in rectus abdominis, external oblique, lower abdominals, multifidus, and erector spinae.
• Data were normalized to maximal voluntary contraction in eleven healthy males.

Main Results:

• Abdominal bracing and Swiss ball exercises showed significantly higher EMG values for rectus abdominis, external oblique, lower abdominals, and erector spinae compared to other exercises.
• Abdominal hollowing exercise selectively increased lower abdominal activity.
• Hip abduction exercise demonstrated the highest multifidus activation.

Conclusions:

• Abdominal bracing and Swiss ball exercises are effective aquatic interventions for maximizing trunk muscle activity in healthy males.
• Specific exercises like abdominal hollowing and hip abduction can selectively target certain trunk muscles.
• These findings can inform exercise prescription for individuals with low back pain.