scholarly journals PECULIARITY OF HEART RATE VARIABILITY IN STUDENTS WITH DIFFERENT INTENSITY OF PHYSICAL LOAD

2021 ◽  
Author(s):  
M.V. Muzhichenko ◽  
A.G. Gubasheva
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiovascular System ◽  
Physical Load ◽  
Physical Culture ◽  
Rate Variation ◽  
Heart Rate Variation ◽  
Student Body ◽  
High Level

We studied the heart rate variability among students of the direction “Physical culture and life safety” with a high level of physical activity and students of the department of biology with a lower level of physical activity. It was revealed that higher physical activity of students provides a favorable level of heart rate variation, a type of regulation of the cardiovascular system, and increases the reserve capacities of the student body.

scholarly journals Features of Change of Students 'Heart Rate Variability Indicators under the Influence of Mental and Physical Load

2020 ◽  
Vol 5 (6) ◽  
pp. 396-403
Author(s):  
Kochyna M. L. ◽  
◽  
A. A. Bila ◽  
I. G. Bondarenko ◽  
O. V. Bondarenko
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiovascular System ◽  
Stress Index ◽  
Total Power ◽  
Signal Spectrum ◽  
Significant Deterioration ◽  
Low Frequencies ◽  
Upper Limit

The high level of mental and physical training loads on the body of students requires a good development of adaptive-compensatory mechanisms, stress resistance, psychological endurance. On the other hand, modern research indicates the low level of health of students and their maladaptation to high levels of stress, which determines the relevance of the study of changes in the functioning of the cardiovascular system to develop measures to correct adverse conditions and improve physical and mental health. The purpose of the work was to determine the features of changes in heart rate variability of students under the influence of mental and physical activity, taking into account gender characteristics. Material and methods. The article presents the results of a study of heart rate variability of 128 students (65 male and 63 female) of the Petro Mohyla Black Sea National University aged 17-25 years. All students had indicators of variability of resting heart rate, after mental and physical activity on short recordings of the cardio signal (2 minutes), obtained with the help of rhythm "MPFI rhythmograph-1" and EasyHRV software (LLC "ASTER-IT", Kharkiv). We used the proofreading method by Kryvonosov M. V. et al. (2001), which consisted of finding and selecting a specific letter in test tables for 20-25 minutes. Aerobic exercise consisted of running a distance of 2000 m on a rowing machine Concept-2 for 10 minutes. The research results were processed using descriptive statistics and non-parametric criteria. Results and discussion. The results of research showed that at rest almost all statistical and temporal indicators of heart rate variability of boys and girls were within the age norms. Mental load did not lead to a significant deterioration of the indicators studied, which indicated the stereotype of reaction. Exercises led to a significant deterioration in the cardiovascular system of students, as evidenced by a significant decrease relative to the lower limit of the norm of SDNN and RMSSD (almost four times); increase in the index of autonomic balance (above the upper limit of the norm by 90% for boys and 71% for girls); exceeding the upper limit of the norm twice with the indicators of vegetative rhythm and regulatory processes adequacy; an increase in the stress index of boys by 7 times and more than 5 times for girls, which led to exceeding the upper limit of the norm by more than 4-5 times; reduction of the total power of the cardio signal spectrum in boys by 9 times, and by 8 times in girls; power of the spectrum of very low frequencies twice, low frequencies by 5-8 times, high frequencies by 6-11 times. Conclusion. Low energy spectral parameters, as well as reducing the variability of cardio intervals and increasing the stress index are manifestations of hyperadaptive response to exercise and indicate low adaptive capacity of students, which requires the introduction of rehabilitation activities

scholarly journals Insulin Sensitivity Regulates Autonomic Control of Heart Rate Variation Independent of Body Weight in Normal Subjects1

2001 ◽  
Vol 86 (3) ◽  
pp. 1403-1409 ◽  
Author(s):  
R. Bergholm ◽  
J. Westerbacka ◽  
S. Vehkavaara ◽  
A. Seppälä-Lindroos ◽  
T. Goto ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Body Weight ◽  
Insulin Sensitivity ◽  
Insulin Infusion ◽  
Rate Variation ◽  
Heart Rate Variation ◽  
Fasting Plasma ◽  
Blood Pressures

It is unclear whether insulin sensitivity independent of body weight regulates control of heart rate variation (HRV) by the autonomic nervous system. Insulin action on whole-body glucose uptake (M-value) and heart rate variability were measured in 21 normal men. The subjects were divided into 2 groups [normally insulin sensitive (IS, 8.0 ± 0.4 mg/kg·min) and less insulin sensitive (IR, 5.1 ± 0.3 mg/kg·min)] based on their median M-value (6.2 mg/kg·min). Spectral power analysis of heart rate variability was performed in the basal state and every 30 min during the insulin infusion. The IS and IR groups were comparable, with respect to age (27 ± 2 vs. 26 ± 2 yr), body mass index (22 ± 1 vs. 23 ± 1 kg/m2), body fat (13± 1 vs. 13 ± 1%), systolic (121 ± 16 vs. 117 ± 14 mm Hg) and diastolic (74 ± 11 vs. 73 ± 11 mm Hg) blood pressures, and fasting plasma glucose (5.4 ± 0.1 vs. 5.5 ± 0.1 mmol/L) concentrations. Fasting plasma insulin was significantly higher in the IR (30 ± 4 pmol/L) than in the IS (17 ± 3 pmol/L, P < 0.05) group. In the IS group, insulin significantly increased the normalized low-frequency (LFn) component, a measure of predominantly sympathetic nervous system activity, from 36 ± 5 to 48 ± 4 normalized units (nu; 0 vs. 30–120 min, P < 0.001); whereas the normalized high-frequency (HFn) component, a measure of vagal control of HRV, decreased from 66 ± 9 to 48 ± 5 nu (P< 0.001). No changes were observed in either the normalized LF component [35 ± 5 vs. 36 ± 2 nu, not significant (NS)] or the normalized HF component (52 ± 6 vs. 51 ± 4 nu, NS) in the IR group. The ratio LF/HF, a measure of sympathovagal balance, increased significantly in the IS group (0.92 ± 0.04 vs. 1.01 ± 0.04, P < 0.01) but remained unchanged in the IR group (0.91 ± 0.04 vs. 0.92 ± 0.03, NS). Heart rate and systolic and diastolic blood pressures remained unchanged during the insulin infusion in both groups. We conclude that insulin acutely shifts sympathovagal control of HRV toward sympathetic dominance in insulin-sensitive, but not in resistant, subjects. These data suggest that sympathetic overactivity is not a consequence of hyperinsulinemia.

Influence of Radius of Horizontal Curve on Driver's Psychology and Physiology on the Two-Lane Mountain Highway

2012 ◽  
Vol 226-228 ◽  
pp. 2335-2339
Author(s):  
Liang Zhao ◽  
Meng Li Zhang
Keyword(s):  
Heart Rate ◽  
Driving Safety ◽  
Rate Variation ◽  
Heart Rate Variation ◽  
Horizontal Curve ◽  
The World ◽  
High Level ◽  
The Relationship ◽  
Highway Management

At the present time, the accident remains at a high level all over the world. It mostly happened on the two-lane mountain highway. Through analysis of the relationship between radius of horizontal curve and driving safety of the drivers on two-lane mountain highway, variations of heart rate was be introduced. The variations of heart rate will be changed with Radius of horizontal curve through qualitatively and quantitatively analysis. However, the maximum of drivers' heart rate does not occur on the limit radius of horizontal curve. It locates at the place slightly larger than the limit radius of horizontal curve. The model between heart rate variation and radius of horizontal curve square was established. Finally, some useful advises were suggested to strengthen the two-lane highway management.

Calculation of Heart Rate Variation Owing to the Effect of Electromagnetic Fields Waves (EMF)

2018 ◽  
Vol 10 (2) ◽  
pp. 48-53 ◽  
Author(s):  
Mohammed Yahya H. ◽  
◽  
Ali Adil Turki ◽  
Ali H. F. Alnasraui ◽  
Qasim shaker K ◽  
...  
Keyword(s):  
Heart Rate ◽  
Electromagnetic Fields ◽  
Rate Variation ◽  
Heart Rate Variation

Numeric analysis of heart rate variation in intrauterine growth-retarded fetuses: A longitudinal study

1992 ◽  
Vol 166 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Rosalinde J.M. Snijders ◽  
Lucia S.M. Ribbert ◽  
Gerard H.A. Visser ◽  
Eduard J.H. Mulder
Keyword(s):  
Heart Rate ◽  
Longitudinal Study ◽  
Rate Variation ◽  
Heart Rate Variation ◽  
Intrauterine Growth

scholarly journals The effect of level of injury and physical activity on heart rate variability following spinal cord injury

2017 ◽  
Vol 42 (2) ◽  
pp. 212-219 ◽  
Author(s):  
Athanasios Kyriakides ◽  
Dimitrios Poulikakos ◽  
Angeliki Galata ◽  
Dimitrios Konstantinou ◽  
Elias Panagiotopoulos ◽  
...  
Keyword(s):  
Physical Activity ◽  
Spinal Cord ◽  
Heart Rate ◽  
Spinal Cord Injury ◽  
Heart Rate Variability ◽  
Cord Injury

scholarly journals Exercise intensity to maximal aerobic speed, physical activity level and heart rate variability in postmenopausal women

2020 ◽  
Vol 20 (2) ◽  
pp. 63-70
Author(s):  
Felipe de Ornelas ◽  
Danilo Rodrigues Batista ◽  
Vlademir Meneghel ◽  
Wellington Gonçalves Dias ◽  
Guilherme Borsetti Businari ◽  
...  
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Physical Exercise ◽  
Postmenopausal Women ◽  
Aerobic Capacity ◽  
Exercise Intensity ◽  
Physical Activity Level ◽  
Activity Level ◽  
Maximal Aerobic Speed

Physical inactivity is main cause of disease worldwide. Identify the physical exercise preference, resulting in increases adherence and future intention to perform physical activity. The preference of the intensity of exercise questionnaire (PRETIE-Q) is the main tool used to assess preference in physical exercise. Variables as age, body mass index (BMI), usual physical activity level (PAL), maximal oxygen uptake (VO2máx), can influence in PRETIE-Q answers. The purpose of this study was investigate if there is relation between preference for exercise intensity with maximal aerobic speed (MAS), PAL and heart rate variability (HRV) in postmenopausal women phase. Participated of study 30 subjects who answer PRETIE-Q together with analyses of MAS, PAL and HRV. Preference was large correlated with MAS (r = 0.63), PAL (r = 0.57) and HRVRMSSD (r = 0.52). Together, MAS (40.4%), PAL (10.7%) and HRVRMSSD (6.4%) explained 57.5% of the preference score. This results study allow to health professional, that prescribe physical exercise, understand that subjects with high aerobic capacity, cardiovagal modulation and usual PAL will have preference for high intensity exercise. In consequence, can increase the adherence to systematic practice of physical exercise. Conclude that preference of exercise intensity for women in postmenopausal phase is related with aerobic capacity, high HRV and physical activity level.

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