scholarly journals Influence of millimeter electromagnetic waves on the functional capabilities of the lower limb muscles in athletes - volleyball players

2021 ◽  
Vol 11 (11) ◽  
pp. 231-236
Author(s):  
G. Nasibullin ◽  
E. Bobro ◽  
S. Gushcha ◽  
N. Badiuk
Keyword(s):  
Electromagnetic Waves ◽  
Lower Leg ◽  
Fiber Bundles ◽  
Electromagnetic Effect ◽  
Muscular System ◽  
Functional Capabilities ◽  
Lower Limb Muscles ◽  
Blood Microcirculation ◽  
Volleyball Players ◽  
Millimeter Electromagnetic Waves

The authors, when observing 22 athletes - volleyball players of different volleyball specialization, assessed the effect of millimeter electromagnetic waves (EMW) on the functional state of the muscular system of the lower extremities. The electromagnetic effect was carried out using the "Complex SP 80" apparatus (frequencies 3900 - 4120 kHz were used). Electrodes were applied to the muscles of the thigh and lower leg, sinusoidal discharges were applied for 10 seconds during the strength training period. The results of observations showed that under the influence of EME, the height of the jump increases by 7%, due to the increase in the energy of the jump and its intensity. The release of the activity of the knee joint is also noted. The authors believe that under the influence of EME, the transmission of regulatory impulses in neuromuscular contact improves, which contributes to the synchronization and strength of contractions of the muscle fiber bundles. Also, under the influence of EMW, blood microcirculation in the muscle improves.

scholarly journals PSYCHOPHYSIOLOGICAL FEATURES OF VOLLEYBALL PLAYERS WITH HEARING IMPAIRMENT

2020 ◽  
Vol 20 (S1) ◽  
pp. 128-135
Author(s):  
O Litovchenko ◽  
A Maximova
Keyword(s):  
Nervous System ◽  
Reaction Time ◽  
Hearing Impairment ◽  
Symmetric Distribution ◽  
Functional Capabilities ◽  
Volleyball Players ◽  
Visual Reaction ◽  
The Central Nervous System ◽  
Motor Tests ◽  
The Right

Aim. The paper aims to reveal the features of the central nervous system and interhemispheric asymmetry in volleyball players with hearing impairment. Materials and methods. The study involved 14 athletes of various sports experience with varying degrees of hearing impairment aged from 20 to 35 years (average age 29.20 ± 1.3 years). Simple visual reaction was studied in terms of the reaction time, reaction stability, and functional capabilities of the nervous system. To establish the manual asymmetry, the M. Annette questionnaire and motor tests (dynamometry, tests for intertwined fingers, the applause test) were used, the coefficient of the right hand was calculated. When detecting visual asymmetry, the Rosenbach test and the telescope test were used. The coefficient of the right eye was also calculated. Results. It was established that a third of the examined athletes had a symmetric distribution of signs in both the visual and manual spheres. The reliable dependence between symmetric distribution and sports titles was not found. The reaction time in volleyball players with hearing impairment was reduced. The reaction stability and the level of functional capabilities were within the normal range and had a significant dependence on the sports rank and category. Conclusion. It was revealed that volleyball players with hearing impairment formed a special type of interhemispheric interaction characterized by a more uniform distribution between the right and left hemispheres, which resulted in low values of manual and visual asymmetry.

scholarly journals The Study of Lower Limb EMG Signals Between Male and Female Muslim during Pertaining to Sujud Postures in Solat

2019 ◽  
Vol 9 (1) ◽  
pp. 24
Author(s):  
Hazwani Harun ◽  
Nashrul Fazli Bin Mohd Nasir ◽  
Ahmad Faizal Salleh
Keyword(s):  
Lower Limb ◽  
Tibialis Anterior ◽  
Lower Leg ◽  
Male And Female ◽  
Leg Muscles ◽  
Paired Samples ◽  
Lower Limb Muscles ◽  
Significant Difference ◽  
Data Signal ◽  
Gastrocnemius Muscles

Electromyography signal level in term of %MVC at lower limb muscles on static posture of feet during sujud (prostration) in solat had been studied based on the sayings of Prophet Muhammad (hadiths). Gastrocnemius and Tibialis Anterior were the chosen muscles as both are the major lower leg muscles on the lower limb part. A total of 10 male and 10 female subjects had participated in this study. The EMG data signal results were analyzed statistically using the Paired-Samples T Test as all the data are normally distributed. The statistical result showed that there is no significant difference of the muscles' signal on the respective posture between male and female. The result of EMG level in term of %MVC between male and female showed that during pertaining to sujud posture, Gastrocnemius muscles are more active in male while Tibialis Anterior muscles are more active in female.

scholarly journals The Effects of a Six-week Plyometric Training Program on the Stiffness of Anterior and Posterior Muscles of the Lower Leg in Male Volleyball Players

2017 ◽  
Vol 20 ◽  
pp. 107-115
Author(s):  
Dariusz Mroczek ◽  
Edward Superlak ◽  
Tomasz Seweryniak ◽  
Krzysztof Maćkała ◽  
Marek Konefał ◽  
...  
Keyword(s):  
Training Program ◽  
Lower Leg ◽  
Plyometric Training ◽  
Volleyball Players

Superheterodyne amplification of sub-millimeter electromagnetic waves in an n-GaAs film

2003 ◽  
Vol 34 (4) ◽  
pp. 231-235 ◽  
Author(s):  
S. Koshevaya ◽  
V. Grimalsky ◽  
J. Escobedo-Alatorre ◽  
M. Tecpoyotl-Torres
Keyword(s):  
Electromagnetic Waves ◽  
Gaas Film ◽  
Millimeter Electromagnetic Waves
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