The effect of short-term isometric training on core/torso stiffness

Area of Science:

• Biomechanics
• Exercise Physiology
• Sports Science

Background:

• Core exercise is fundamental for rehabilitation and athletic performance.
• Core stiffness is theorized to reduce pain and enhance physical capabilities.
• Understanding immediate effects of training on core stiffness is crucial.

Purpose of the Study:

• To investigate the immediate effects of a specific isometric core exercise protocol on core stiffness.
• To compare changes in core stiffness between individuals with varying levels of core training experience.

Main Methods:

• 24 participants (12 inexperienced, 12 experienced) underwent a 15-minute isometric core exercise session.
• Passive and active core stiffness were measured before and after the exercise bout.
• Passive stiffness was assessed using a frictionless bending apparatus; active stiffness via a quick-release mechanism.

Main Results:

• Isometric core training significantly increased passive and active core stiffness in most directions for both groups.
• An exception was observed in passive left lateral bending stiffness among experienced participants (P < 0.05).
• No significant differences in stiffness changes were found between inexperienced and experienced groups.

Conclusions:

• A single session of the tested isometric core training can induce immediate, albeit temporary, increases in core stiffness.
• These acute changes in core stiffness may have short-term implications for injury resilience and performance.
• The training approach appears effective regardless of prior core training experience.