The purpose was to compare the time to task failure for a sustained isometric contraction performed at a submaximal intensity with the elbow flexor muscles by young and old men who were matched for strength. Eight young men (18-31 yr) and eight old men (67-76 yr) sustained an isometric contraction at 20% of maximal voluntary contraction (MVC) torque until the target torque could no longer be ac...

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...

OBJECTIVE This paper aims to show that, compared with young women, there is an apparent discrepancy in the reported sexual behaviour of young men and records of their fatherhood. DESIGN The data come from four studies of the sexual behaviour of young people in various parts of Britain between 1960 and 1990 and from statistics published by the Office of Population Censuses and Surveys. MAIN ...

Background Regular exercises decrease the risk of various diseases. This is a reason to recommend exercises for health promotion. Thus American Heart Association (AHA) and American College of Sport Medicine (ACSM) have issued guidelines for young people resistance exercises. Aim: To investigate the effect of resistance training exercise on hematological, immunological and coagulation parameters...