the present study aimed to determine the effects of 12 weeks of aerobic exercise in different times of day on some cardiovascular risk factors in overweight men. 40 non-athletes, overweight men with an average age of 22.25±2.45 years old and bmi of 30.06±2.42 kg/m2 were randomly allocated to four groups of morning and evening aerobic training and control. morning and evening training groups per...

We tested the hypothesis that the work of the heart was not a limiting factor in the attainment of maximal oxygen uptake (VO2 max). We measured cardiac output (Q) and blood pressures (BP) during exercise at two different rates of maximal work to estimate the work of the heart through calculation of the rate-pressure product, as a part of the ongoing discussion regarding factors limiting VO2 max...

BACKGROUND Participation in aerobic exercise generates increased cardiorespiratory fitness, which results in a protective factor for cardiovascular disease and all-cause mortality. High-intensity interval training might cause higher increases in cardiorespiratory fitness in comparison with moderate-intensity continuous training; nevertheless, current evidence is not conclusive. To our knowledge...

Heart rate variability reflects the activity of autonomic nervous system. The aim was to evaluate the value of short-term spectral analysis of heart rate for monitoring the effects of exercise training on the autonomic nervous system in subjects following myocardial infarction. Short-term spectral analysis of heart rate variability was performed during standardised supine-standing-supine test i...

BACKGROUND The relative contributions of decreases in maximal heart rate, stroke volume, and oxygen extraction and of changes in body weight and composition to the age-related decline in maximal oxygen uptake (VO2max) are unclear and may be influenced by sex and level of physical activity. METHODS AND RESULTS To investigate mechanisms by which aging, sex, and physical activity influence VO2ma...