Analysis of muscle tone and strength and cerebral blood flow in kickboxers

Purpose: the article deals with providing a characteristic of muscle and tone status as well as precerebral and cerebral hemodynamics in kickboxers. Materials: 102 athletes with the qualification from the Second-class Athlete to the Master of Sport voluntary participated in the study. The average age of athletes at the moment of the study was 20.90±0.50. The average sports experience of participants was equal to 4.15±2.77. The control group consisted of apparently healthy young males of the same age but not involved in sports activities (n=35). The indicators of muscle tone and strength and cerebral blood flow were studied with the help of Doppler ultrasound of the main arteries of the head, electroneuromyography, and transcranial Doppler. Results: the article provides the results of the study on the effect of muscle and tone disturbances in the spinal motion segment on the functional status of precerebral and cerebral blood flow. The disturbances in nerve conduction velocity in the symmetrical groups of trunk muscles are considered as the reason for muscle imbalance in 50% of athletes. The analysis of blood flow indicators in kickboxers with muscle imbalance revealed a typical increase in the tone of precerebral vessels and changes in the gradients of blood flow velocity in various segments of the carotid and vertebral arteries. The decrease of cerebral blood flow in athletes, in particular, the venous outflow of a dystonic nature, is the result of spasmodic and ischemic Doppler patterns against a decreased indicator of arteriovenous balance. Mild traumatic brain injuries should also be taken into account when speaking about the development of cerebrovascular dysfunction as a result of kickboxers’ sparring activities and competitions. Conclusions: Differentiated disturbances in sensory and motor conductivity result in the disturbance of afferentation and muscle imbalance intensity. Angiospasm and vascular ischemia determine the increase in the linear blood flow velocity in the carotid system and the decrease in the vessels of the vertebrobasilar system against the increase in resistivity indicators in the carotid basins and vertebrobasilar system in kickboxers. Correlation analysis revealed visceral motor correlations, which proved the influence of the functional status of the regional muscle system on cerebral hemodynamics. The analysis of tone and strength muscle characteristics and cerebral blood flow in kickboxers indicates the necessity of correcting muscle and tone asymmetry of the paravertebral area.

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Changes in cerebral blood flow velocity in patients with hypothyroidism

Acta Endocrinologica ◽

10.1530/eje-11-0254 ◽

2011 ◽

Vol 165 (3) ◽

pp. 465-468 ◽

Cited By ~ 4

Author(s):

Uygar Utku ◽

Mustafa Gokce ◽

Mesut Özkaya

Keyword(s):

Blood Flow ◽

Cerebral Blood Flow ◽

Flow Velocity ◽

Blood Flow Velocity ◽

Cerebral Blood Flow Velocity ◽

Hormone Replacement ◽

Control Group ◽

Control Groups ◽

Blood Flow Velocities ◽

Flow Velocities

BackgroundAt present, hypothyroidism is a well-known risk factor for cardiovascular disorders. The aim of this study was to assess the effects of hypothyroidism on cerebral blood flow velocity with transcranial Doppler (TCD) ultrasonography.Design and methodsIn this study, 30 subjects were enrolled for clinical, subclinical, and healthy control groups. Bilateral middle cerebral artery (MCA) peak-systolic, end-diastolic, and mean blood flow velocities; Gosling's pulsatility index values; and Pourcelot's resistance index values were recorded and compared with each other. TCD was performed in clinical hypothyroid patients after they became euthyroid with thyroid hormone replacement therapy (HRT). The initial and post-HRT results for the clinical hypothyroid group were then compared and evaluated.ResultsThere were 30 subjects in each group. Men/women ratio and mean age in clinical hypothyroid, subclinical hypothyroid, and control groups were 3/27, 4/26, and 5/25, and 37.4, 34.4, and 36.7 respectively. Peak-systolic, end-diastolic, and mean blood flow velocities of bilateral MCA were similar in clinical and subclinical hypothyroid groups but significantly higher when compared with the control group. After adequate thyroid HRT in clinical hypothyroid group, the peak-systolic, end-diastolic, and mean blood flow velocities were significantly decreased.ConclusionsIncreased cerebral blood flow velocities were observed in clinical and subclinical patients with hypothyroidism. The normalization of increased blood flow velocity with thyroid HRT suggests a reversible condition.

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Cerebral hemodynamics in patients with arterial hypertension of the older age groups with orthostatic hypotensive reactions

European Heart Journal ◽

10.1093/ehjci/ehaa946.2805 ◽

2020 ◽

Vol 41 (Supplement_2) ◽

Author(s):

I Atyunina ◽

E Oschepkova ◽

A Rogoza ◽

N Lazareva

Keyword(s):

Blood Pressure ◽

Blood Flow ◽

Cerebral Blood Flow ◽

Arterial Hypertension ◽

Flow Velocity ◽

Blood Flow Velocity ◽

Cerebral Blood Flow Velocity ◽

Age Groups ◽

Cerebral Hemodynamics ◽

Older Age

Abstract Objective To study cerebrovascular autoregulation in pts with arterial hypertension (AH) with orthostatic hypotensive reactions (OHR) during an active orthostatic test (AOT). 50 pts with AH (40 g, 10 m), 68.5±5.3 years, I-III gr. were examined. Blood pressure monitoring (BPM) by “BP Lab”, Russia. AOT was performed with continuous measurement of systolic blood pressure (SBP) and diastolic blood pressure (DBP) in the digital artery (“Task Force Monitor”, “CNSystems” Austria). The criteria for the OHR were evaluated according to guidelines ESC, 2018. Cerebral hemodynamics in the middle cerebral artery (MCA) was monitored during the AOT (Angiodin-2K (BIOSS company, Russia), using a transcranial sensor with a freq. of 2 MHz. In the MCA, systolic (Vs), diastolic (Vd), average cerebral blood flow velocity (Vm), pulsation index (Pi), and vascular resistance index (Ri), the difference ΔVm30s,% and ΔVm30s, were recorded. Statistical analysis was performed using the non-parametric Mann-Whitney method using Statistica 6.0 Results In 17 (34%) pts with AH, OHR was detected. BP in pts with OHR compared with pts without OHR (mmHg), SBP: 131.7±12.2 vs 131.3±13.8, p>0.05; DBP 74.3±11.8 vs 75.3±8.9, p>0.05). In AOT in pts with OHR, the Vm in the orthostasis significantly decreased compared to pts without OHR, both in the first 30 s. and at 3 min. (Tabl.1). Conclusions In pts with AH of older age groups with OHR, in comparison with the same category of pts without OHR, there is a change in cerebral autoregulation in the form of a more pronounced decrease in cerebral blood flow velocity in MCA in the orthostatic position. Funding Acknowledgement Type of funding source: None

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