Trunk Movement and Sequential Trunk Muscle Activation During Oscillation Exercises Using Flexible Poles

Area of Science:

• Biomechanics
• Exercise Physiology
• Rehabilitation Science

Background:

• Flexible pole exercises, like Flexi-bar, are used for trunk muscle strengthening in rehabilitation.
• Optimal strategies to maximize training benefits from these exercises require further investigation.

Purpose of the Study:

• To analyze trunk movements and muscle activation patterns during flexible pole oscillation exercises with varying weights.
• To understand how different pole weights influence exercise biomechanics and muscle engagement.

Main Methods:

• Twelve healthy males performed oscillation exercises using flexible poles of different weights.
• Trunk kinematics (center of mass) and surface electromyography of 10 trunk muscles were recorded.

Main Results:

• Consistent anterior-posterior trunk movement was observed during exercises.
• Center-of-mass displacement increased with heavier poles.
• Significant activation was noted in erector spinae, internal obliques, multifidus, and external obliques, with phasic sequential activation in skilled individuals using heavier poles.

Conclusions:

• Flexible pole oscillation exercises induce trunk movement and effectively activate key trunk muscles.
• Heavier poles may enhance training effects through increased movement and specific muscle activation patterns.