Background—Muscle sympathetic vasoconstrictor nerve activity increases with age in healthy humans but does not result in an augmented forearm vasoconstrictor tone. We tested the hypothesis that this is due to a reduction in postjunctional -adrenergic responsiveness to endogenous norepinephrine (NE) release and determined whether this was specific to 1or 2-adrenergic receptors. Methods and Resul...

Introduction: Effects of exercise on different body systems, especially cardiovascular and musculoskeletal systems are evidenced. There is a dynamic homeostatic balance between coagulation and fibrinolysis in normal circulation. Effect of exercise and training on this homeostatic balance has been studied extensively but there are a few studies with regards to analysis of the effects of train...

Limb venous compliance decreases with advancing age, even in healthy humans. To test the hypothesis that adrenergic mechanisms contribute to age-associated reductions in limb venous compliance, we measured calf venous compliance before and during acute systemic α- and β-adrenergic blockade in eight young (27 ± 1 yr old, mean ± SE) and eight older healthy men (67 ± 2 yr old). Calf venous complia...

Introduction: This research was aimed at examining acute responses of hormones such as growth hormone (GH), total testosterone (TT), free testosterone (FT), free fatty acid (FFA) and cortisol to resistance (R), endurance (E) and endurance-resistance (ER) exercise. Methods: The participants of this study were 10 healthy young men. R protocol included bench press, lateral pull down, leg exten...

introduction: genu varum is considered a risk factor for knee osteoarthritis. being aware of postural swing changes in various standing positions among genu varum patients, provide insight to prevent osteoarthritis in this population. this study is undertaken to compare postural stability in various standing positions between young healthy and genu varum male individuals. materials and methods:...

introduction: effects of exercise on different body systems, especially cardiovascular and musculoskeletal systems are evidenced. there is a dynamic homeostatic balance between coagulation and fibrinolysis in normal circulation. effect of exercise and training on this homeostatic balance has been studied extensively but there are a few studies with regards to analysis of the effects of training...

This study compared the heart rate, finger arterial pressure (AP) and electromyographic (EMG) activity of selected anti-gravity muscles during the initial and prolonged phases of orthostatic stress in healthy young and older men. Beat-by-beat recordings of heart rate, finger systolic pressure, diastolic pressure and mean AP were made during supine rest and 5 min of 90 degrees head-up tilt (HUT)...