Healthy centenarians have better anthropometric, endocrine, metabolic and immunological parameters than aged subjects (>75 years old). Heart rate variability (HRV) has been demonstrated to be a good index of the cardiac autonomic nervous system. It is not known whether there are any differences in cardiac autonomic nervous system activity between aged subjects and healthy centenarians. It is po...

Cardiovascular drift, the progressive increase in heart rate and decrease in stroke volume that begins after approximately 10 min of prolonged moderate-intensity exercise, is associated with decreased maximal oxygen uptake, particularly during heat stress. Consequently, the increased heart rate reflects an increased relative metabolic intensity during prolonged exercise in the heat when cardiov...

Rohrer, Daniel K., Eric H. Schauble, Kavin H. Desai, Brian K. Kobilka, and Daniel Bernstein. Alterations in dynamic heart rate control in the b1-adrenergic receptor knockout mouse. Am. J. Physiol. 274 (Heart Circ. Physiol. 43): H1184–H1193, 1998.—b1-Adrenergic receptors (b1-ARs) are key targets of sympathetic nervous system activity and play a major role in the beat-to-beat regulation of cardia...

The purpose of this study was to examine heart rate recovery (HRR) and linear/nonlinear heart rate variability (HRV) before and after resistance training. Fourteen young men (25.0 +/- 1.1 yr of age) completed a crossover design consisting of a 4-wk time-control period, 6 wk of resistance training (3 days/wk), and 4 wk of detraining. Linear HRV was spectrally decomposed using an autoregressive a...

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 aim of the study was to compare maximal and submaximal cardiorespiratory responses between progressive tests on a treadmill on land (TRE), and stationary running on land (SRL) and in water (SRW), while also comparing two methods of determining the second turn point (ST) (ventilatory curve and heart rate deflection point). The study sample consisted of nine active women (23 ± 1.94 years) tha...

the aim of the present study was to examine the effect of aerobic training and green tea supplementation on serum leptin and insulin resistance in overweight and obese men. for this purpose, 43 overweight and obese men were selected voluntarily and were included in four groups: control (body mass index 31.4+3.7, vo2max 39.3+3.8 ml/kg.min), green tea supplement (body mass index, 30.3±2.8 k/m2, v...