The aim of the following study is to analyze the mechanical efficiency on heart rate frequency and oxygen consumption during exercise bicycle test. The following study included seven respondents (men) aged 19-28 years, all students in the National Sports Academy “Vassil Levski” (Sofia, Bulgaria) – specialists in cycling. During two consecutive days, they were administered to sub maximal bicycle...

Heart rate is not only a major risk marker in heart failure but also a general risk marker. Within the last few years, it has been demonstrated that reduction of resting heart rate to <70 bpm is of significant benefit for patients with heart failure, especially those with impaired left ventricular systolic function. Ivabradine is the first innovative drug synthesized to reduce heart rate. It se...

BACKGROUND increasing age affects aerobic capacity, with an average loss of 10% or more per decade. AIM to determine the effect of ageing on the circulatory system in middle-aged men during 33 years of physical training. METHODS 15 men initially aged 45 years took part in an exercise training programme for 25-33 years. Nine serial measurements were made at rest and during maximal effort. Ae...

the purpose of this study was to examine the effect of coq10 supplement consumption during tapering phase on some of endurance performance indices in middle distance runners. to do this, 18 trained middle distance male runners with an age of 21±1.26 years old, a weight of 65.6±4.7kg and height of 179±2.5 were selected.  this study was based on the pre test - post test method with two experiment...

Objectives: Heart rate recovery (HRR) after exercise is clinically important as a predictor of mortality. In addition, HRR an indicator cardiac autonomic activity, since increased vagal activity and diminished sympathetic return the heart to resting conditions exercise. The previous attempts model using polynomial, first-order second-order modelling have produced mixed results. this study, we h...

BACKGROUND This study aimed to investigate the effect of strenuous exercise on β-endorphine (β-END) level in fibromyalgia (FM) patients compared to healthy subjects. METHODS We enrolled 30 FM patients and 15 healthy individuals. All study participants underwent a treadmill exercise test using modified Bruce protocol (M.Bruce). The goal of the test was achieving at least 70% of the predicted m...

BACKGROUND Physical activity influences energy metabolism in human subjects by increasing activity-induced energy expenditure and resting metabolic rate for several hours after exercise. Effects of exercise on circulating thyroid hormone values remain controversial. We have investigated the effect of acute aerobic exercise on thyroid hormone values. MATERIALS/METHODS The effect of different i...