The higher tactile sensitivity of the sole in athletes helps to increase the postural stability in difficult sensory conditions

The aim of the work is to investigate the relationship between the postural stability and the threshold of tactile sensitivity (TTS) of the sole of the feet in athletes of different specializations. The study involved athletes of different types (n=33) and non-training students (n=19). Material and methods. The stability of the vertical pose was determined in standing on a stabiloplatform with open (EO) and closed (EC) eyes, as well as in a stance on a movable see-saw using stabilometry. The threshold of tactile sensitivity were determined using a set of Semmes-Weinstein nylon monofilaments (Fabrication Enterprises. USA) in a relaxed lying position. Results. The average TTS of the right and left feet in athletes was lower (≈ -33.2%, p < 0.01) than in non-athletes. The area of oscillation (ELS) of the center of pressure of the feet in a conventional stance with EO and EC, as well as on a see-saw with EC movable in the sagittal plane, did not differ between groups. However, the TTS of the right foot was positively correlated in the general group with the ELS in standing on the see-saw with EC. Conclusions. High tactile sensitivity does not have a positive effect on the regulation of posture in normal standing conditions, but it helps to increase postural stability in more difficult sensory conditions. In the practice of sports with high requirements for maintaining postural balance, it is necessary to pay attention to the condition of the skin of the foot, as an important sensory zone that ensures the regulation of balance.