Abstract

The aim of this study was to examine whether is an influence of the exposition on different inductions of magnetic fields on rating of perceived exertion during 10 min long standardised physical cycloergometer exercise. The investigation was performed in 40 healthy, 2. The participants were randomly +/- non-smoking, fit men, mean age 20 attributed to 4 groups, each including 10 subjects. The first one (group E18) consisted of subjects exposed to the magnetic field with the intensity of 18 μT, the second one (group E64) exposed to the magnetic field with the intensity of 64 μT. Two control groups were formed to accompany these exposed to the magnetic field. In these placebo groups (S-T) subjects were not exposed to the magnetic field (so called false therapy, „sham treatment”). The study consisted of 4 steps: pilot study, the first endurance test, exposure to the magnetic field, the second endurance test. The aim of the pilot study was to define subjective feelings of the participant during the effort, his reaction to the effort and also practical familiarization with the character and rules of the endurance test and Borg scale interpretation during 10 min of endurance cycloergometer test. The first endurance test was performed two days after the pilot study with the same rules and its goal was to measure the level of tiredness according to the Borg scale during 10 min long standardised physical effort. The second endurance test was performed according to the same rules as the first one and its goal was to analyse the effect of 20 exposures to the magnetic field with the intensity of 18 and 64 μT repeated daily on the perception of tiredness increase as expressed in the Borg scale when performing 10 min long standardised physical effort. In subjects exposed to 18 μT magnetic field neither changes in the perception of fatigue nor changes in the heart rate at particular levels of the Borg scale have been observed. When compared with both control and placebo group subjects exposed to 64 μT strong magnetic field exhibited statistically significant increase in the period of attaining consecutive levels of fatigue as measured in the Borg scale. Results of the present study demonstrated beneficial influence of the magnetic field with 64 μT intensity on changes in the perception of fatigue during physical workload. Verf.-Referat