Duration of Effect of the Approximation Technique on the Dynamic Control Structure

Abstract

[Purpose] The purpose of this study was to investigate the durability of the effect on the dynamic control structure after performance of the Approximation technique (ApT) administered to the lower extremity. Body sway was measured on a stabilometer under two conditions: one without a stimulus, and the other with a disturbance stimulus. [Subjects] The subjects were 38 healthy males, 19 to 27 years of age. [Methods] Participants in the experimental group stood on two scales, and we performed ApT from the iliac crests toward the long axes direction of lower extremities on each leg for one minute in turn and confirmed the approximation with a 10 kg load. Experimental group performed the stabilometer in an unstable environment and we measured the center of gravity sway after the intervention. The control group was measured without performing the maneuver. [Results]Significant differences in Area of Ellipse (AoE) and locus length per unit area (L/A) after ApT for lasted for 70 minutes. [Conclusion] We conclude ApT is a useful improved stability of center of gravity for 70 minutes.