Effect of contrast massage on bioelectric activity of skeletal muscle and brain of womenwith overweight

The study group included 75 women - volunteerswith the body weight of 72.0 ± 4.5 kg, aged 39 to 48. The criterion for inclusion in the group was manifestation of the same degree ofaesthetic defects (abdomen volume 114 ± 5.74, hips 117 ± 4.91). Exclusion criterion was the presence of chronic diseases of thecardiovascular or endocrine system, spine, and skin. All respondents received 12 contrast massage sessions during 24 days. The effect ofcontrast massage correction for women with overweight manifested as changes in anthropometric parameters - the weight loss of10.1%, the volumes in the abdominal and pelvic-femoral area 7-10% lower, the decrease of the ratio of waist circumference to thevolume of hips of 24%. The achieved changes lasted for nine months of observation. Contrast massage of women with excess bodyweight contributed to the increase of the amplitude and increased spectral power of alpha rhythm in the occipital and temporal regions ofthe central, while reducing the power of slow rhythms, delta-range. The reduced the amplitude of the beta rhythm was also noted. Thedegree of asymmetry of the electrical activity of the cortex decreased, which was particularly noticeable in the temporal leads. Themechanism of the identified changes is apparently due to the rising influences of massage effects on the central nervous system. In thesecond part we investigated the electrical activity of muscles before and after contrast massage by electromyography. All the musclegroups under study registered an increase of maximum credible amplitude of bioelectrical activity. There was a much more pronouncedincrease in the average amplitude of bioelectrical activity. At the same time, the oscillation frequency of all muscles was significantlyreduced. This suggests that in this case the most rational mechanism for reducing the rate of force is realized - synchronization of motorunits, simultaneous fulfillment of their involvement in the movement. After a course of contrast massage a reliable increase of theamplitude and duration of the M-response is marked, and the duration of the latent period is significantly reduced. The results indicatethat under the influence of contrast normalization massage is the process of neuromuscular transmission, which may be associated withimproved energy metabolism in tissues and reconstruction of regulatory influences from the central nervous system.

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