Energy expenditure and gas exchange measurements in postoperative patients

1992 ◽  
Vol 20 (9) ◽  
pp. 1273-1283 ◽  
Author(s):  
LUIGI SEVERING BRANDI ◽  
MARIA GRANA ◽  
TOMMASO MAZZANTI ◽  
FRANCESCO GIUNTA ◽  
ANDREA NATALI ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Energy Expenditure

0.64 Energy expenditure and gas exchange after thoracic surgery

1995 ◽  
Vol 14 ◽  
pp. 23
Author(s):  
L.S. Brandi ◽  
R. Bertolini ◽  
A. Janni ◽  
C.A. Angeletti
Keyword(s):  
Gas Exchange ◽  
Energy Expenditure ◽  
Thoracic Surgery

scholarly journals Effects of a Multi-Ingredient Preworkout Supplement Versus Caffeine on Energy Expenditure and Feelings of Fatigue during Low-Intensity Treadmill Exercise in College-Aged Males

Sports ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 132
Author(s):  
Daniel J. Lutsch ◽  
Clayton L. Camic ◽  
Andrew R. Jagim ◽  
Riley R. Stefan ◽  
Brandon J. Cox ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Energy Expenditure ◽  
Treadmill Exercise ◽  
Acute Effects ◽  
Beta Alanine ◽  
Low Intensity ◽  
Capsicum Annum ◽  
Tea Extract ◽  
Low Intensity Exercise ◽  
Preworkout Supplement

The primary purpose of this study was to examine the acute effects of a multi-ingredient (i.e., caffeine, green tea extract, Yohimbe extract, capsicum annum, coleus extract, L-carnitine, beta-alanine, tyrosine) preworkout supplement versus a dose of caffeine (6 mg·kg−1) on energy expenditure during low-intensity exercise. The effects of these treatments on substrate utilization, gas exchange, and psychological factors were also investigated. Twelve males (mean ± SD: age = 22.8 ± 2.4 years) completed three bouts of 60 min of treadmill exercise on separate days after consuming a preworkout supplement, 6 mg·kg−1 of caffeine, or placebo in a randomized fashion. The preworkout and caffeine supplements resulted in significantly greater energy expenditure (p < 0.001, p = 0.006, respectively), V˙O2 (p < 0.001, p = 0.007, respectively), V˙CO2 (p = 0.006, p = 0.049, respectively), and V˙E (p < 0.001, p = 0.007, respectively) compared to placebo (collapsed across condition). There were no differences among conditions, however, for rates of fat or carbohydrate oxidation or respiratory exchange ratio. In addition, the preworkout supplement increased feelings of alertness (p = 0.015) and focus (p = 0.005) 30-min postingestion and decreased feelings of fatigue (p = 0.014) during exercise compared to placebo. Thus, the preworkout supplement increased energy expenditure and measures of gas exchange to the same extent as 6 mg·kg−1 of caffeine with concomitant increased feelings of alertness and focus and decreased feelings of fatigue.

scholarly journals Gas exchange and energy cost of flight in the white-necked raven, Corvus cryptoleucus

1983 ◽  
Vol 103 (1) ◽  
pp. 121-130 ◽  
Author(s):  
D. M. Hudson ◽  
M. H. Bernstein
Keyword(s):  
Steady State ◽  
Wind Tunnel ◽  
Gas Exchange ◽  
Energy Expenditure ◽  
Energy Cost ◽  
Power Input ◽  
Co2 Exchange ◽  
Maximum Power ◽  
Air Speed

Energy expenditure during steady-state, wind tunnel flights was estimated from O2 and CO2 exchange in five white-necked ravens (Corvus cryptoleucus, mean mass, 0.48 kg) at air speeds of 8–11 m/s. Power input was closely similar to allometric predictions based on data from other species of smaller birds. It increased significantly with air speed and flight angle above horizontal, and decreased with increasing angles below horizontal. Maximum power input reached seven times the preflight value measured under resting but not basal conditions, 14 times the previously measured basal values and three times the calculated maximum for a similar sized running mammal. Energy cost to travel 1 km decreased with increasing air speed. These trends are similar to those previously observed in smaller birds.

scholarly journals Metabolic cost calculations of gait using musculoskeletal energy models, a comparison study

2019 ◽  
Author(s):  
Anne D. Koelewijn ◽  
Dieter Heinrich ◽  
Antonie J. van den Bogert
Keyword(s):  
Experimental Data ◽  
Gas Exchange ◽  
Energy Expenditure ◽  
Repeated Measures ◽  
Metabolic Cost ◽  
Pulmonary Gas Exchange ◽  
Metabolic Energy ◽  
Energy Models ◽  
Cost Calculations ◽  
Metabolic Energy Expenditure

AbstractThis paper compares predictions of metabolic energy expenditure in gait using seven metabolic energy expenditure models to assess their correlation with experimental data. Ground reaction forces, marker data, and pulmonary gas exchange data were recorded for six walking trials at combinations of two speeds, 0.8 m/s and 1.3 m/s, and three inclines, −8% (downhill), level, and 8% (uphill). The metabolic cost, calculated with the metabolic energy models was compared to the metabolic cost from the pulmonary gas exchange rates. A repeated measures correlation showed that all models correlated well with experimental data, with correlations of at least 0.9. The model by Bhargava et al. [7] and the model by Lichtwark and Wilson [21] had the highest correlation, 0.96. The model by Margaria [23] predicted the increase in metabolic cost following a change in dynamics best in absolute terms.

Heart rate and respiratory adjustments during work of increasing intensity in Hinterwaelder and Zebu oxen

1997 ◽  
Vol 64 (2) ◽  
pp. 233-238 ◽  
Author(s):  
M. Rometsch ◽  
U. Roser ◽  
K. Becker ◽  
A. Susenbeth
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Gas Exchange ◽  
Energy Expenditure ◽  
Bos Taurus ◽  
Carbon Dioxide Production ◽  
Heart Beat ◽  
Total Carbon ◽  
Younger Age ◽  
Quality Diet

AbstractHeart rate, ventilation measurements and gas exchange were studied in seven Hinterwaelder (Bos taurus) (494 (s.e. 16) kg) and five zebu (Bos indicusj oxen (516 (s.e. 60) kg), while the animals were standing, walking and pulling different loads. During standing, the heart rate, respiration rate, ventilation volume per min, total carbon dioxide production, total oxygen consumption and oxygen consumption per heart beat were lower in the zebu group than in the Hinterwaelder group (P < 0·05). The higher values for the Hinterwaelder were probably due to their higher metabolic rate, because of their younger age, higher level of feeding and better quality diet. The adaptation of gas exchange to higher work loads was achieved mainly by higher ventilation volumes. The composition of the expired air changed minimally. At similar levels of draught power output, the total energy expenditure minus energy expenditure of walking of the zebu oxen was lower than that of the Hinterwaelder oxen (P < 0·02). On the other hand at similar levels of heat production, the heart rate and ventilation volume per min did not differ significantly between the two breeds (P > 0·05). In spite of the differences in environment, feeding level and draught efficiency, the physiological adaptations made by the two breeds in response to work were similar.

Exercise and postexercise energy expenditure in growing pigs

1988 ◽  
Vol 66 (6) ◽  
pp. 721-730 ◽  
Author(s):  
Mary Pat Petley ◽  
Henry S. Bayley
Keyword(s):  
Gas Exchange ◽  
Energy Expenditure ◽  
Heat Production ◽  
Open Circuit ◽  
Growing Pigs ◽  
Training Period ◽  
Young Pigs ◽  
Extra Energy ◽  
Energy Dissipated ◽  
And Control

Young pigs (ca. 10 kg) were trained to run on a motor-driven treadmill for 1 h each day. After a 2-week training period the gas exchange of exercised and control animals was measured using an open circuit, indirect calorimeter. The exercised pigs ran for 2 h in the calorimeter, and then rested for 2 h. They received a day's allocation of feed and remained in the calorimeter for a total of 23 h. The total heat production of the exercised pigs was 523 kJ/kg, compared with 433 kJ/kg of the controls. Monitoring the heat production throughout the 23-h period showed that only 43% of the extra heat dissipated by the exercised pigs was lost during the 2 h of exercise, with a higher rate of heat production for the remaining 21 h accounting for the 57% of the extra energy dissipated as heat. The results suggest that exercise increases energy expenditure well beyond the time devoted to the activity itself.

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