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This study tested the effect of treadmill walking speed on typing performance when these tasks were performed simultaneously. 24 research participants (M age = 23.2 yr.) performed a typing test under each of four conditions including the control (seated), treadmill walking at 1.3 km/hr., 2.25 km/hr., and 3.2 km/hr. Results indicated that treadmill walking(More)
Plasma catecholamines (Ca) increase over time during prolonged exercise at a constant work rate. Possible reasons for this include hypoglycemia, dehydration, increased perceived exertion, and rising body temperature. In an effort to ascertain the contribution of elevated core temperature on the plasma Ca response to prolonged exercise four trained men were(More)
This study was designed to investigate the variables which contribute to the determination of optimal pedalling rate in cycling. Five trained bicycle racers were used as subjects for the study. The experiment consisted of five 20- to 30-min tests at about 85% of each subject's pre-determined VO2max. Pedal rates of 40, 60, 80, 100, and 120 rpm were used. In(More)
The purpose of this study was to examine the systolic blood pressure and plasma renin activity (PRA) responses to chronic stress in normotensive rats and in rats with one hypertensive parent. Twenty-four male Wistar-Kyoto (WKY) and 24 male F1 offspring of spontaneously hypertensive and WKY rats (BHR) were randomly assigned to 3 groups of 8 each.(More)
The ability of exercise training to block the generation of hypertension produced by chronic stress in the borderline hypertensive rat was tested. Twenty-three male borderline hypertensive rats, F1 offspring of spontaneously hypertensive and Wistar-Kyoto rats, were divided into three groups. Two groups (8 rats per group) were subjected to 2 hours of daily,(More)
Six subjects pedaled a stationary cycle ergometer to exhaustion on three separate occasions while breathing gas mixtures of 17, 21, or 60% O2 in N2. Each subject rode for 3 min at work rates of 60, 90, 105 W, followed by 15-W increases every 3 min until exhaustion. Inspired and expired gas fractions, ventilation (V), heart rate, and blood lactate were(More)
A number of previous studies have demonstrated that some aspect of baroreflex function is altered as hypertension develops. However, no studies have determined whether a chronic stressor can alter baroreflex function in the resting state. In the present study, male borderline hypertensive rats (BHR) were divided into three groups: control, stressed daily(More)
Wistar-Kyoto (WKY) and borderline hypertensive rats (BHR) were exposed to either a normal or high-sodium chloride (NaCl) diet for 8 wk. Cardiovascular and renal data were collected from arterial and bladder catheters, respectively, in conscious animals during control and stress (aversive classical conditioning) sessions. Results indicated that BHR on a(More)