Abstract

Background: It has recently been noticed that the quantity of stress affects postural stability in young women. The study was conducted with the goal of investigating whether increased stress may damagingly effect posture control in 90 young men (71 right-handed and 19 left-handed) while maintaining an upright bipedal posture, while keeping their eyes open or closed. Perceived Stress Scale (PSS) was administered and changes in free cortisol levels were monitored (Cortisol Awakening Response, CAR) in order to evaluate the amount of stress present during awakening, while the Profile of Mood States (POMS) was used to estimate distress on the whole. Posture control was evaluated with the use of a force platform, which, while computing a confidence ellipse area of 95%, was engaged by the Center of Pressure through five stability stations and was sustained for a minimum of 52 s, with and without visual input. Another goal of the experiment was to find out whether or not cortisol increases in CAR were linked with rises of blood lactate levels. Results: CAR, PSS and POMS were found to be extensively related. Furthermore, it has been observed that increases in salivary cortisol in CAR are associated with small but significant increases in blood lactate levels. As expected, stress levels did affect postural stability. Conclusions: The results of the present study confirm that the level of stress can influence postural stability, and that this influence is principally obvious when visual information is not used in postural control.

Highlights

  • The ability to monitor the standing position is essential for walking and starting a quick, voluntary movement

  • As a second measure of stress, we examined the Cortisol Awakening Response (CAR), i.e., a quick rise of free cortisol levels, in humans, happening in the 30 min after awakening and returning to baseline values one hour later [20]

  • The assessment of kinematic and kinetic variables has enabled the detection of cognitive influences on postural stability and gait [39,40,41,42]

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Summary

Introduction

The ability to monitor the standing position is essential for walking and starting a quick, voluntary movement. This capability is frequently observed by examining the variants of the center of pressure. It has recently been noticed that the quantity of stress affects postural stability in young women. 52 s, with and without visual input Another goal of the experiment was to find out whether or not cortisol increases in CAR were linked with rises of blood lactate levels. Conclusions: The results of the present study confirm that the level of stress can influence postural stability, and that this influence is principally obvious when visual information is not used in postural control

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