Results 261 to 270 of about 31,445 (305)
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An analysis of the left ventricular response to isometric exercise
American Heart Journal, 1974Abstract Analysis of the left ventricular response to isometric exercise was performed in a group of patients undergoing diagnostic cardiac catheterization. A normal response was observed in nine patients with normal resting hemodynamics (Group I).
William H. Gaasch +4 more
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Plasma Catecholamines during Sustained Isometric Exercise
Clinical Science, 19731. Plasma catecholamine, haemodynamic and metabolic responses to sustained isometric exercise were studied in eight healthy subjects, who maintained handgrip at the 30% level of maximal voluntary contraction (MVC) for as long as possible. 2. The sustained handgrip was accompanied by a significant increase in plasma noradrenaline (NA) and
Krystyna Nazar +4 more
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Isometric Exercise Testing-Reply
Archives of Internal Medicine, 1983In Reply. —Dr Simmons raises two important questions: (1) Can contracting muscles develop force without shortening? (2) What is the precise mechanism for the increase in BP observed during isometric exercise? Before answering the first question, I want to make clear that the term shortening as used herein refers to the external length of the muscle ...
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Effect of isometric exercise on catecholamines in the coronary circulation
European Journal of Applied Physiology and Occupational Physiology, 1977Arterial and coronary sinus blood levels of catecholamines, adenosine 3', 5'-cyclic monophosphate (c-AMP) and lactate were measured during isometric exercise in fourteen patients. In no patient did lactate production occur. Mean resting total catecholamine levels both arterial (0.53 +/- 0.07 ng/ml; 2.94 +/- 0.38 nmol/l) and coronary sinus (0.4 +/- 0.08
D. C. Fluck, R. H. Robson
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Quadriceps Oxygenation during Isometric Exercise in Sailing
International Journal of Sports Medicine, 2008The aim of the present study was to investigate why blood lactate after prolonged quadriceps contraction during hiking is only marginally increased. Eight sailors performed five 3-min hiking bouts interspersed with 5-s recovery periods. Whole body oxygen uptake, heart rate and lactate were recorded, along with continuous-wave near-infrared spectroscopy
Olga Georgiadou +4 more
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Energy Cost of Isometric Exercise
Research Quarterly. American Association for Health, Physical Education and Recreation, 1960Abstract The metabolic cost of static exercise was studied in relation to work load. The exercise consisted of the subjects holding 50-, 35-, and 20-lb. weights with the knees partially flexed. Rather sizable oxygen requirements and oxygen debts were obtained, which seemed to increase linearly as the size of the weight increased.
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A novel method for the performance of isometric exercise in the home
Journal of Sports Sciences, 2005There is a paucity of research on devices suitable for home-based isometric exercise. Our aim was to compare cardiovascular responses to isometric exercise using novel and established methods. Ten individuals (age 34.0 +/- 8.5 years, mass 68.2 +/- 10.4 kg, height 1.72 +/- 0.09 m; mean +/- s) performed three different isometric exercise protocols with ...
Jonathan D. Wiles +3 more
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Physiological effects of micropauses in isometric handgrip exercise
European Journal of Applied Physiology and Occupational Physiology, 1991The physiological response to continuous and intermittent handgrip exercise was evaluated. Three experiments were performed until exhaustion at 25% of maximal voluntary contraction (MVC): experiment 1, continuous handgrip (CH) (n = 8); experiment 2, intermittent handgrip with 10-s rest pause every 3 min (IH) (n = 8); and experiment 3, as IH but with ...
Svend Erik Mathiassen +2 more
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The effect of handgrip span on isometric exercise performance
Ergonomics, 1980Fourteen male and eight female volunteers served as subjects in these experiments lo determine the effect of hand tool dimensions on isometric strength, endurance, the surface EMG above the active muscle, and the cardiovascular responses to isometric exercise.
Alexander R. Lind +3 more
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Prediction of Pregnancy‐Induced Hypertension by Isometric Exercise
Asia-Oceania Journal of Obstetrics and Gynaecology, 1994AbstractThe purpose of this study is to evaluate an isometric exercise (Hand‐Grip test) as a method to predict pregnancy‐induced hypertension (PIH). One hundred and twenty‐five pregnant women were given the Hand‐Grip (HG) test before the 15th gestational week.
S. Tomoda +3 more
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