With this study we tested the hypothesis that 6 wk of endurance training increases maximal cardiac output (Qmax) relatively more by elevating blood volume (BV) than by inducing structural and functional changes within the heart. Nine healthy but untrained volunteers (Vo2max 47 ± 5 ml·min(-1)·kg(-1)) underwent supervised training (60 min; 4 times weekly at 65% Vo2max for 6 wk), and Qmax was dete...

Maximal bicycle ergometer exercise in an asymptomatic male population, aged 40-65 years, revealed 63 subjects with 'ischaemic' ST changes. The work intensity at the time of appearance of this change was expressed as actual heart rate as a per cent ofmaximum heart rate, and oxygen uptake as a per cent ofmaximal oxygen uptake. If the exercise had been stopped at a target heart 'rate of 85 per cen...

The purpose of this study was to elucidate the effect of exercise intensity on retrograde blood flow and shear rate (SR) in an inactive limb during exercise under normoxic and hypoxic conditions. The subjects performed two maximal exercise tests on a semi-recumbent cycle ergometer to estimate peak oxygen uptake (V˙O2peak) while breathing normoxic (inspired oxygen fraction [FIO2 = 0.21]) and hyp...

OBJECTIVES The purpose of this study was to examine the relation between exercise intensity and immune function. METHODS Ten healthy young males underwent a constant work rate exercise of three levels, 90%, 80% and 70% ventilatory threshold (VT) work rate, for 20 min on a bicycle ergometer. These work rates were calculated for each individual based on his VT work rate obtained by the incremen...

the purpose of this study was to compare the effects of active and passive recovery on immune system indexes after a graded exhaustive exercise in male college athletes. for this purpose, 20 college athletes of physical fitness training were selected by cooper test and their bmi and then they were divided into two groups randomly: group 1 (active recovery) and group 2 (passive recovery). each s...

Introduction: This study aims at analyzing the effect of 12 weeks physical exercise (30 minutes for three days a week: 70-85% of the maximum heart rate) on variations of inflammation markers in middle-aged women's Coronary Heart diseases (CHDs). Methods: In this study a total of 40 subjects including 40-55 years old women were selected purposively and were divided into two experimental and c...

To determine the constancy of hemodynamic and antianginal effects of the constant infusion of intravenous nitroglycerin (NTG) and their relationship to infusion rate and plasma NTG concentration, we administered maximal tolerated doses of intravenous NTG (range 10 to 120 micrograms/min, mean = 52 +/- 33 micrograms/min) and placebo to 10 patients with chronic stable angina for 25 hr each in a ra...

The heart rates of 20 movement studies students were measured during multi-stage cycle ergometer tests. The tests were repeated on five occasions following the ingestion of different pre-exercise meals and the results compared. A glucose solution taken three hours prior to the exercise (G3) resulted in the lowest heart rates at each work rate. The highest heart rates at each work rate were reco...

Four subjects, whose ages averaged 24.3 years, were examined to assess the isometric component of dynamic exercise during the following 4 conditions: treadmill running, cycle ergometry, aerobic exercise following a video, and during hip extension exercise (lunges). The isometric component of exercise was characterized by examining heart rate (HR) and blood pressure (BP), muscle fatigue, oxygen ...