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RSM Blog: The Science of Movement & Biomechanics

Synchronizing Body Axes and Center of Gravity through Balance Ball Training

The Relationship Between Pelvic Nutation, Counternutation, and Center of Gravity

The Relationship Between Pelvic Nutation, Counternutation, and Center of Gravity

The essence of Sports Medicine-Based Performance Training lies in mastering the synchronization between the body’s gravitational center (COG) and the central axis of unstable surfaces, such as balance or BOSU balls. This process defines true postural alignment: by aligning the kinetic chain with the ball’s fluctuating center, practitioners establish stability through motion, not stillness. It is a process of neuromuscular calibration, where each muscle group learns its precise contribution to whole-body equilibrium.

Within the Dynamic Postural Assessment framework of RSM International Academy, this synchronization process re-educates the kinetic chain through movement transitions—from static to dynamic and dynamic to static. By refining proprioceptive sensitivity and fascial tension distribution, practitioners cultivate a conscious awareness of their Body Axis Alignment. This enhances control in sport-specific actions, reduces compensatory patterns, and improves motor efficiency.

In clinical and athletic settings alike, this synchronization is essential not only for postural correction but also for pain management and rehabilitation. Once the kinetic chain becomes functionally integrated, the athlete achieves both mechanical efficiency and movement fluidity—hallmarks of high-level sports medicine practice.

References:

Willardson, J.M. (2007). Core stability training: applications to sports conditioning programs. Journal of Strength and Conditioning Research, 21(3), 979–985.

Panjabi, M.M. (1992). The stabilizing system of the spine. Part I: Function, dysfunction, adaptation, and enhancement. Journal of Spinal Disorders, 5(4), 383–389.

Kinetic Chain Training on Unstable Surfaces for Dynamic Postural Assessment

Dynamic postural assessment with balance disk

Dynamic postural assessment with balance disk

In Sports Medicine-Based Performance Training, the development of neuromuscular integration through unstable surfaces—such as BOSU and balance balls—is fundamental. These tools challenge both the ascending and descending kinetic chains, forcing the body to maintain alignment through constant micro-adjustments. Each subtle movement activates proprioceptors and enhances intermuscular coordination, promoting a dynamic equilibrium between the body’s Center of Gravity (COG) and the base of support.

At RSM International Academy, this method is not used for simple balance exercises but as an advanced clinical approach to Dynamic Postural Assessment. Through controlled instability, practitioners evaluate how kinetic chain dysfunctions and pain-avoidance postures (PAP) manifest under load and motion. By analyzing compensatory mechanisms and re-educating proprioceptive pathways, students learn to correct postural inefficiencies and restore functional movement.

This form of neuromechanical conditioning creates adaptability across joints and fascia, stabilizing body axes through both ascending and descending kinetic synchronization. Ultimately, the athlete or therapist gains refined control of postural reflexes—vital for pain reduction, joint mobility, and long-term athletic performance.

References:

Behm, D.G., & Colado, J.C. (2012). The effectiveness of resistance training using unstable surfaces and devices for rehabilitation. Journal of Strength and Conditioning Research, 26(3), 716–726.

Zazulak, B.T., Hewett, T.E., Reeves, N.P., Goldberg, B., & Cholewicki, J. (2007). Deficits in neuromuscular control of the trunk predict knee injury risk. American Journal of Sports Medicine, 35(7), 1123–1130.

RSM International Academy | Hironori Ikeda
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