scholarly journals Energy Requirement Assessment and Water Turnover in Japanese College Wrestlers Using the Doubly Labeled Water Method

2017 ◽  
Vol 63 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Hiroyuki SAGAYAMA ◽  
Emi KONDO ◽  
Keisuke SHIOSE ◽  
Yosuke YAMADA ◽  
Keiko MOTONAGA ◽  
...  
Keyword(s):  
Energy Requirement ◽  
Doubly Labeled Water ◽  
Water Turnover ◽  
Doubly Labeled Water Method

Validation of single-sample doubly labeled water method

1989 ◽  
Vol 256 (2) ◽  
pp. R572-R576 ◽  
Author(s):  
M. D. Webster ◽  
W. W. Weathers
Keyword(s):  
Water Flux ◽  
Passerine Bird ◽  
Single Sample ◽  
Co2 Production ◽  
Doubly Labeled Water ◽  
Water Turnover ◽  
Sample Technique ◽  
Doubly Labeled Water Method ◽  
The One ◽  
Sample Method

We have experimentally validated a single-sample variant of the doubly labeled water method for measuring metabolic rate and water turnover in a very small passerine bird, the verdin (Auriparus flaviceps). We measured CO2 production using the Haldane gravimetric technique and compared these values with estimates derived from isotopic data. Doubly labeled water results based on the one-sample calculations differed from Haldane values by less than 0.5% on average (range -8.3 to 11.2%, n = 9). Water flux computed by the single-sample method differed by -1.5% on average from results for the same birds based on the standard, two-sample technique (range -13.7 to 2.0%, n = 9).

Energy Requirement Assessment in Japanese Table Tennis Players Using the Doubly Labeled Water Method

2017 ◽  
Vol 27 (5) ◽  
pp. 421-428 ◽  
Author(s):  
Hiroyuki Sagayama ◽  
Genki Hamaguchi ◽  
Makiko Toguchi ◽  
Mamiko Ichikawa ◽  
Yosuke Yamada ◽  
...  
Keyword(s):  
Energy Requirement ◽  
Physical Activities ◽  
Activity Level ◽  
Doubly Labeled Water ◽  
Table Tennis ◽  
Tennis Players ◽  
Metabolic Equivalents ◽  
Total Daily Energy Expenditure ◽  
Doubly Labeled Water Method ◽  
Physiological Demands

Total daily energy expenditure (TEE) and physical activity level (PAL) are important for adequate nutritional management in athletes. The PAL of table tennis has been estimated to about 2.0: it is categorized as a moderateactivity sport (4.0 metabolic equivalents [METs]) in the Compendium of Physical Activities. However, modern table tennis makes high physiological demands. The aims of the current study were to examine (1) TEE and PAL of competitive table tennis players and (2) the physiological demands of various types of table tennis practice. In Experiment 1, we measured TEE and PAL in 10 Japanese college competitive table tennis players (aged 19.9 ± 1.1 years) using the doubly labeled water (DLW) method during training and with an exercise training log and self-reported energy intake. TEE was 15.5 ± 1.9 MJ·day-1 (3695 ± 449 kcal·day-1); PAL was 2.53 ± 0.25; and the average training duration was 181 ± 38 min·day-1. In Experiment 2, we measured METs of five different practices in seven college competition players (20.6 ± 1.2 years). Three practices without footwork were 4.5–5.2 METs, and two practices with footwork were 9.5–11.5 METs. Table tennis practices averaged 7.1 ± 3.2 METS demonstrating similarities with other vigorous racket sports. In conclusion the current Compendium of Physical Activities underestimates the physiological demands of table tennis practice for competition; the estimated energy requirement should be based on DLW method data.

Total energy expenditure in elite open-water swimmers

2019 ◽  
Vol 44 (2) ◽  
pp. 225-227
Author(s):  
Hiroyuki Sagayama ◽  
Kosuke Mimura ◽  
Makiko Toguchi ◽  
Jun Yasukata ◽  
Hiroaki Tanaka ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Total Energy ◽  
Energy Requirement ◽  
Open Water ◽  
Total Energy Expenditure ◽  
Activity Level ◽  
Study Group ◽  
Doubly Labeled Water ◽  
World Class ◽  
Doubly Labeled Water Method

This study aimed to examine the total energy expenditure (TEE) and physical activity level (PAL) of elite open-water swimmers. Our study group included 5 world-class competitive open-water swimmers. TEE was measured using the doubly labeled water method for 1 week. The TEE was 4549 ± 1185 kcal/day. The PAL was 3.22 ± 0.46. Our results may provide a reference to optimize energy requirement support.

Doubly labeled water method: in vivo oxygen and hydrogen isotope fractionation

1986 ◽  
Vol 251 (6) ◽  
pp. R1137-R1143 ◽  
Author(s):  
D. A. Schoeller ◽  
C. A. Leitch ◽  
C. Brown
Keyword(s):  
Water Loss ◽  
Isotope Fractionation ◽  
Isotopic Fractionation ◽  
Co2 Production ◽  
Doubly Labeled Water ◽  
Water Turnover ◽  
Evaporative Water ◽  
Equilibrium Control ◽  
Doubly Labeled Water Method

The accuracy and precision of the doubly labeled water method for measuring energy expenditure are influenced by isotope fractionation during evaporative water loss and CO2 excretion. To characterize in vivo isotope fractionation, we collected and isotopically analyzed physiological fluids and gases. Breath and transcutaneous water vapor were isotopically fractionated. The degree of fractionation indicated that the former was fractionated under equilibrium control at 37 degrees C, and the latter was kinetically fractionated. Sweat and urine were unfractionated. By use of isotopic balance models, the fraction of water lost via fractionating routes was estimated from the isotopic abundances of body water, local drinking water, and dietary solids. Fractionated water loss averaged 23% (SD = 10%) of water turnover, which agreed with our previous estimates based on metabolic rate, but there was a systematic difference between the results based on O2 and hydrogen. Corrections for isotopic fractionation of water lost in breath and (nonsweat) transcutaneous loss should be made when using labeled water to measure water turnover or CO2 production.

Flux hydriques et métabolisme énergétique dans un peuplement de Lacertidés des îles Kerkennah (Tunisie)

1988 ◽  
Vol 66 (3) ◽  
pp. 555-561 ◽  
Author(s):  
Roland Vernet ◽  
Claude Grenot ◽  
Saïd Nouira
Keyword(s):  
Energy Expenditure ◽  
Daily Activity ◽  
Water Flux ◽  
Sympatric Species ◽  
Doubly Labeled Water ◽  
Daily Energy Expenditure ◽  
Water Turnover ◽  
Semiarid Environment ◽  
Daily Energy ◽  
Active Forager

Water flux and daily energy expenditure were measured with doubly labeled water (3HH18O) in two insectivorous sympatric species of Lacertidae of Kerkennah islands (Tunisia), Eremias olivieri (mean body mass: 1.1 g) and Acanthodactylus pardalis (4.5 g) in a semiarid environment. Water turnover and field metabolic rate of Eremias olivieri (174 μL H2O g−1 d−1 and 250 J g−1 d−1) were, respectively, 2.5 and 5 times higher than those of Acanthodactylus pardalis (70 μL H2O g−1 d−1 and 52 J g−1 d−1). The water turnover of Eremias olivieri is one of the highest known among insectivorous lizards, and the daily energy expenditure of Acanthodactylus pardalis one of the lowest. The most plausible explanations are the differences in the size of the prey eaten by each species at this time of the season and in the duration of daily activity; the daily activity of Acanthodactylus pardalis is short (4.5 h d−1) although it is a sit-and-wait predator, whereas Eremias olivieri is active regularly every day for a longer period (7.5 h d−1) although it is an active forager. The high values of water turnover in Eremias olivieri suggest that food is not the only source of water for lizards in this particular insular environment.

Longitudinal assessment of energy expenditure in pregnancy by the doubly labeled water method

1993 ◽  
Vol 57 (4) ◽  
pp. 494-505 ◽  
Author(s):  
G R Goldberg ◽  
A M Prentice ◽  
W A Coward ◽  
H L Davies ◽  
P R Murgatroyd ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Doubly Labeled Water ◽  
Longitudinal Assessment ◽  
Doubly Labeled Water Method ◽  
In Pregnancy
Sign in / Sign up

Export Citation Format

Share Document