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...

hemorheology specialists believe that athletes of different sport fields have different hemorheological patterns. the aim of this study was to investigate the effect of sport field on hemorheological variables following acute aerobic exercise. athletes were divided into three groups of 15 subjects (endurance runners: mean±sd: age 24.6±5.2 yr, bf% 6.8±1.6, bmi 21±1; football players: age 22.5±1....

BACKGROUND Preoperative β-blockade has been posited to result in better outcomes for vascular surgery patients by attenuating acute hemodynamic changes associated with stress. However, the incremental effectiveness, if any, of β-blocker usage in blunting heart rate responsiveness for vascular surgery patients who avoid general anesthesia remains unknown. METHODS We reviewed an existing databa...

This study examined the time course and extent of decrease in peak oxygen uptake (V̇O2peak) during self-paced exercise in HOT (35°C and 60% relative humidity) and COOL (18°C and 40% relative humidity) laboratory conditions. Ten well-trained cyclists completed four consecutive 16.5-min time trials (15-min self-paced effort with 1.5-min maximal end-spurt to determine V̇O2peak) interspersed by 5 min...

Introduction: Good functional capacity has a high negative predictive value (NPV) in patients with known or suspected coronary artery disease (CAD) similar to a normal gated myocardial perfusion imaging (GMPI). Aim of this study was to evaluate NPV of functional capacity during treadmill exercise in patients with normal GMPI in Pakistani population. Methods: This was a prospective study which ...

The relationship between heart rate (HR) during exercise and exercise capacity in patients with heart failure due to left ventricular systolic dysfunction remains unclear. The accepted diagnostic criterion for chronotropic incompetence (CI), a maximum agepredicted heart rate (MA-PHR) 85%, is seen in 50% of patients with severe heart failure on contemporary medical therapy (1). Whether the lesse...