Does the respiratory system limit the aerobic working capacity of humans?

2000 ◽  
Vol 26 (4) ◽  
pp. 481-487 ◽  
Author(s):  
I. S. Breslav ◽  
M. O. Segizbaeva ◽  
G. G. Isaev
Keyword(s):  
Respiratory System ◽  
Working Capacity ◽  
Aerobic Working Capacity

Chemical and mechanical adaptations of the respiratory system at rest and during exercise in human pregnancy

2007 ◽  
Vol 32 (6) ◽  
pp. 1239-1250 ◽  
Author(s):  
Dennis Jensen ◽  
Katherine A. Webb ◽  
Denis E. O’Donnell
Keyword(s):  
Respiratory System ◽  
Mechanical Response ◽  
Alternative Hypothesis ◽  
Working Capacity ◽  
Ventilatory Control ◽  
Human Pregnancy ◽  
Female Sex Hormones ◽  
Ventilatory Drive ◽  
Peripheral Chemoreflex ◽  
Aerobic Working Capacity

Human pregnancy is characterized by significant increases in ventilatory drive both at rest and during exercise. The increased ventilation and attendant hypocapnia of pregnancy has been attributed primarily to the stimulatory effects of female sex hormones (progesterone and estrogen) on central and peripheral chemoreflex drives to breathe. However, recent research from our laboratory suggests that hormone-mediated increases in neural (or non-chemoreflex) drives to breathe may contribute importantly to the hyperventilation of pregnancy. This review challenges traditional views of ventilatory control, and outlines an alternative hypothesis of the control of breathing during human pregnancy that is currently being tested in our laboratory. Conventional wisdom suggests that pregnancy-induced increases in central respiratory motor output command in combination with progressive thoraco–abdominal distortion may compromise the normal mechanical response of the respiratory system to exercise, increase the perception of exertional breathlessness, and curtail aerobic exercise performance in otherwise healthy pregnant women. The majority of available evidence suggests, however, that neither pregnancy nor advancing gestation are associated with reduced aerobic working capacity or increased breathlessness at any given work rate or ventilation during exhaustive weight-supported exercise.

scholarly journals Changes in Physical and Functional Condition of Young Women Doing Callanetics

2019 ◽  
pp. 532-540
Author(s):  
Irina Gernet ◽  
Valentina Pushkina
Keyword(s):  
Young Women ◽  
Respiratory System ◽  
Positive Impact ◽  
Scientific Evidence ◽  
Health Benefit ◽  
Functional Condition ◽  
Biological Age ◽  
Theoretical Research ◽  
Working Capacity ◽  
Anthropometric Indicators

Contemporary fitness centers try to attract customers with interesting names of methods improving motor activity. Young women are particularly interested in methods aimed at body mass correction and achieving the desired shapes. Not many of them consider health benefit; most are interested in the final outcome. Numerous fitness methods include those whose efficiency and safety for human health still has no scientific evidence. This research is devoted to assessing the efficiency of impacting the biological age, anthropometric indicators and functional condition of cardiovascular and respiratory system, as well as working capacity of young women having and not having the harmful habit of smoking. To solve the above tasks, theoretical research methods were applied: systemic and logical analysis of medical, psychological and pedagogical literature; generalization of practical pedagogical experience. As women were taking exercise, their individual biological and proper age was measured along with anthropometric indicators and functional indicators of respiratory and cardiovascular system; working capacity was measured with PWC170 test following L. I. Abrosimova’s method; muscular stamina and physical fitness levels were measured by flexibility, strength, etc. development indicators. The conducted research demonstrated that Callanetics was an efficient method of correcting the biological age and anthropometric indicators, while making a beneficial impact on cardio-respiratory system and working capacity; smoking, however, frequently neutralizes the technique’s positive impact.

The human thermal portrait and its relations with aerobic working capacity and the blood lactate level

2010 ◽  
Vol 36 (4) ◽  
pp. 447-456 ◽  
Author(s):  
E. B. Akimov ◽  
R. S. Andreev ◽  
Yu. N. Kalenov ◽  
A. A. Kirdin ◽  
V. D. Son’kin ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Lactate Level ◽  
Blood Lactate Level ◽  
Working Capacity ◽  
Aerobic Working Capacity

Aerobic working capacity of Eskimos

1963 ◽  
Vol 18 (4) ◽  
pp. 764-768 ◽  
Author(s):  
K. Lange Andersen ◽  
J. S. Hart
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Maximal Oxygen Uptake ◽  
Pulmonary Ventilation ◽  
Circulatory System ◽  
Maximal Heart Rate ◽  
Working Capacity ◽  
Physiological Capacity ◽  
Caucasian Men ◽  
Aerobic Working Capacity

The aerobic working capacity was measured in eight young Eskimos. Their maximal oxygen uptake averaged 2.6 liter/min. This is considerably lower than that found in young Caucasian men. The heart rate-oxygen uptake relationship also indicates a lower physiological capacity of the Eskimos. Expressing maximal oxygen uptake on a body weight basis brings about substantial agreement with results of experiments on sedentary-living Scandinavian students. The heart rate taken at the end of the maximal work averaged 173 min for the Eskimos which is about 10% lower than found in Caucasian men, indicating that the work test (bicycling) did not activate the circulatory system of the Eskimos maximally. By assuming a linear correlation between heart rate and O2 consumption up to its maximal value, the maximal O2 uptake would have to be 20% greater to give a maximal heart rate similar to that observed in Caucasian men. The pulmonary ventilation efficiency during exercise was found to be lower in Eskimos than in Caucasian men. Submitted on February 7, 1963

THE STANDARDIZATION AND INTERPRETATION OF SUBMAXIMAL AND MAXIMAL TESTS OF WORKING CAPACITY

PEDIATRICS ◽  
1963 ◽  
Vol 32 (4) ◽  
pp. 703-722
Author(s):  
Henry L. Taylor ◽  
Yang Wang ◽  
Loring Rowell ◽  
Gunnar Blomqvist
Keyword(s):  
Pulse Rate ◽  
Respiratory System ◽  
Physical Work ◽  
Oxygen Intake ◽  
Working Capacity ◽  
Homogeneous Groups ◽  
Maximal Oxygen Intake ◽  
Standard Task ◽  
Submaximal Work ◽  
Temperate Environment

IT IS generally agreed by work physiologists that the capacity to perform long continued physical work in a temperate environment is related to the capacity of the cardiovascular respiratory system to deliver oxygen to the muscles (the maximal oxygen intake). Since under carefully standardized conditions in selected homogeneous groups the pulse rate at submaximal levels of work is systematically related to the maximal oxygen intake, it follows that the capacity to perform physical work can be estimated from study of the pulse rate at [SEE FIG. 1. IN SOURCE PDF.] submaximal work levels. Work physiologists have employed for this purpose, the response of the pulse rate to a standard task or have measured the amount of work required to elevate the pulse rate to predetermined pulse levels. Work physiologists have been preoccupied with the estimation of the capacity to do physical work.

Aerobic working capacity in runners

1972 ◽  
Vol 73 (1) ◽  
pp. 25-27
Author(s):  
Ya. P. Pyarnat ◽  
A. A. Viru ◽  
A. P. Pisuke
Keyword(s):  
Working Capacity ◽  
Aerobic Working Capacity
Sign in / Sign up

Export Citation Format

Share Document