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athletes
Dynamics of cardiac performance in athletes during isometric exercise
      
The main structural-functional indices of cardiac performance during isometric exercise were recorded in athletes and non-athletes.
      
The physiological shifts in response to exercise were less obvious in the athletes than in the non-athletes.
      
The objective of this paper is to study the effect of different regimens of interval hypoxia on the cardiorespiratory and hematological functions of athletes in order to use the data obtained to optimize interval hypoxic training.
      
Specific features of the mechanisms and regularities of adaptation to exercise were studied in athletes over 15 years.
      
The concept of a special functional system of adaptation in athletes is based theoretically and confirmed experimentally.
      
Factor analysis of the motor profile parameters demonstrated that the so-called instrumental tests became a separate factor only in athletes, and the features of carrying out these tests correlated with the wrestlers' stances.
      
Apart from this, different indices of the athletes' hand preference were divided into many factors.
      
The Adaptive Response to Aerobic Muscular Work in Athletes
      
Standard parameters of external respiration at the aerobic-anaerobic transition and above the anaerobic (ventilatory) threshold (AT) were studied in highly trained athletes during an incremental treadmill test.
      
The efficiency of the AR to cyclic muscular load varies daily in individual athletes.
      
Activity of Red Blood Cell Enzymes and Oxygen Affinity of Hemoglobin in Athletes during Physical Exercise
      
Athletes displayed a dependence of the popliteal artery lumen on the muscle contractility; however, the luminal diameter of the popliteal artery was relatively low in athletes.
      
Changes in Prolactin and Testosterone Levels Induced by Acute Physical Exertion in Young Female Athletes
      
In order to establish the influence of acute untypical exercise on prolactin and testosterone levels in young female athletes, the authors selected a group of 13 short distance runners who were subjected to exercise on a cycle ergometer.
      
Physical work capacity was significantly higher in athletes than in the untrained subjects during the whole juvenile period.
      
In athletes the age-related physical fitness and aerobic capacity increased to a greater extent but physical development increased to a lesser extent than the same in the untrained subjects.
      
Rheological properties of blood were studied in subjects with high physical activity (athletes).
      
Age-Related Erythrocyte Structure and Rheological Blood Properties in Athletes
      
The relationship between the rheological blood properties and several indices of age-related erythrocyte structure was established in endurance-training athletes (n = 21).
      
 

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