Ivan Ivanov
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View article: Spine Kinematic Alterations in Nordic Walking Under Two Different Speeds of 3 and 5 km/h—A Pilot Study
Spine Kinematic Alterations in Nordic Walking Under Two Different Speeds of 3 and 5 km/h—A Pilot Study Open
Objectives. The present study aimed to quantify changes in spinal kinematics during Nordic walking compared to regular walking (RW) for 60 s on a training path among physically fit young males (n = 20, aged 19–22 years). Methods. Two walki…
View article: Spine Kinematic Alterations in Nordic Walking Under Two Different Speeds of 3 and 5 km/h
Spine Kinematic Alterations in Nordic Walking Under Two Different Speeds of 3 and 5 km/h Open
The present study aimed to quantify changes in spinal kinematics during Nordic walking compared to regular walking for 60 seconds on a training path among physically fit young males (n = 20, aged 19–22 years). Two walking speeds were analy…
View article: Automated Test Creation Using Large Language Models: A Practical Application
Automated Test Creation Using Large Language Models: A Practical Application Open
The article presents work on developing a software application for test creation using artificial intelligence and large language models. Its main goal is to optimize the educators’ work by automating the process of test generation and eva…
View article: SODIUM NITRITE (E250) AND ZINC AS MODULATORS OF THE BIOMECHANICAL PROPERTIES OF BLOOD IN SPORTS
SODIUM NITRITE (E250) AND ZINC AS MODULATORS OF THE BIOMECHANICAL PROPERTIES OF BLOOD IN SPORTS Open
Nutritional supplements are often used by athletes to support their performance. However, if there is no nutrient deficiency, supplementation may not improve performance and may even have a detrimental effect on both performance and health…
View article: Hematological and Hemorheological Parameters of Blood Platelets as Biomarkers in Diabetes Mellitus Type 2: A Comprehensive Review
Hematological and Hemorheological Parameters of Blood Platelets as Biomarkers in Diabetes Mellitus Type 2: A Comprehensive Review Open
Diabetes mellitus type 2 (DM2) is a hypercoagulable state with enhanced platelet (PLT) activation and increased clotting factor production. Simultaneously, the fibrinolytic cell system is inhibited due to the formation of clots with high f…
View article: Hematological and Hemorheological Parameters of Blood Platelets as Biomarkers in Diabetes Mellitus Type 2. A Comprehensive Review
Hematological and Hemorheological Parameters of Blood Platelets as Biomarkers in Diabetes Mellitus Type 2. A Comprehensive Review Open
Diabetes mellitus – type 2 (DM2) is a hypercoaguable state with enhanced platelets (PLTs) activation and increased clotting factor production. Simultaneously, the fibrinolytic cell system is inhibited due to formation of clots with high re…
View article: Current state of natural waters and bottom sediments in the southern part of Kola Bay
Current state of natural waters and bottom sediments in the southern part of Kola Bay Open
The article presents the results of studying the aquatic ecosystem of Kola Bay in 2022. The concentrations of the main chemical parameters were determined using standard methods. The main changes in the obtained results depending on the se…
View article: Ultrasound Experimental Approach for Knee Intra-articular Femur-Tibia Movements at Different Loads
Ultrasound Experimental Approach for Knee Intra-articular Femur-Tibia Movements at Different Loads Open
The purpose of the present study was to develop an experimental model for studying of the intra-articular knee movements depending on the work of the knee joint and applied muscle groups in isometric stretching conditions with different te…
View article: Ultrasound Experimental Approach for Knee Intra-articular Femur-Tibia Movements at Different Loads
Ultrasound Experimental Approach for Knee Intra-articular Femur-Tibia Movements at Different Loads Open
The purpose of the present study was to develop an experimental model for studying of the intra-articular knee movements depending on the work of the knee joint and applied muscle groups in isometric stretching conditions with different te…
View article: Biomechanical, Healing and Therapeutic Effects of Stretching: A Comprehensive Review
Biomechanical, Healing and Therapeutic Effects of Stretching: A Comprehensive Review Open
Characterized in biomedical terms, stretching exercises have been defined as movements applied by external and/or internal forces to increase muscle and joint flexibility, decrease muscle stiffness, elevate the joint range of motion (ROM),…
View article: Biomechanical, Healing and Therapeutic Effects of Stretching. A Review
Biomechanical, Healing and Therapeutic Effects of Stretching. A Review Open
Characterized in biomedical terms, stretching exercises have been defined as movements applied by external and/or internal forces – to increase muscle and joint flexibility, decrease muscle stiffness, to elevate joint range of motion…
View article: Detailed Investigation of Knee Biomechanics during Posture Maintenance while Applying Different Static Loadings on the Spine
Detailed Investigation of Knee Biomechanics during Posture Maintenance while Applying Different Static Loadings on the Spine Open
The aim of this paper was to investigate in detail the biomechanics of the knee during different static loadings on the spine using electromyographic (EMG) signals from six main surface muscles acting in the knee joint; three components of…
View article: Are Floating River Sediments Decreasing on Bulgarian Territory?
Are Floating River Sediments Decreasing on Bulgarian Territory? Open
An analysis is made of the formation factors and regime of floating river sediments on the territory of Bulgaria, considering the influence of the relief (land surface), climatic conditions such as rainfall intensity, snowmelt, wind effect…
View article: RED BLOOD CELL DEFORMABILITY AND PHYSICAL ACTIVITY
RED BLOOD CELL DEFORMABILITY AND PHYSICAL ACTIVITY Open
Physical exertion and sport cause changes of different nature and degree (positive or negative, strong, weak, moderate) in blood and blood cells’ biomechanical and fluid properties. The aim of this minireview was to attempt to summarize th…
View article: Hemorheological Alterations and Physical Activity
Hemorheological Alterations and Physical Activity Open
Elucidating the complex processes that determine the ability of the human body to adapt to specific intense training programs is critical to improving athletic performance in elite athletes. The present work aims to describe the main hemor…
View article: STUDIES ON A PARADOX IN THE WORK OF THE UPPER LIMBS IN ISOMETRIC STRETCHING
STUDIES ON A PARADOX IN THE WORK OF THE UPPER LIMBS IN ISOMETRIC STRETCHING Open
Stretching is a common activity used by athletes, elderly, rehabilitation patients, people involved in fitness programs and many others. In isometric stretching an elongation in the linear dimensions of the kinematic chain of the upper lim…
View article: WHOLE BLOOD VISCOSITY CHANGES AT COAGULATION UNDER COUETTE FLOW
WHOLE BLOOD VISCOSITY CHANGES AT COAGULATION UNDER COUETTE FLOW Open
The aim of the study is to observe how blood viscosity was changed in time in Couette blood flow at coagulation and under steady flow at two low shear rates 0,0237 s -1 and 0,0596 s -1 .Blood samples from one donor with different hematocri…
View article: Electrical Properties of Blood in Patients with Type 2 Diabetes Мellitus
Electrical Properties of Blood in Patients with Type 2 Diabetes Мellitus Open
The aim of the study was to investigate kinetics of blood conductivity in patients with type 2 diabetes mellitus under transient viscometric flow. The measurements were done by the rotational viscometer Contraves Low Shear 30 (Switzerland)…