scholarly journals Institutional applications of solar total energy systems. Third quarterly report

1978 ◽  
Author(s):  
Keyword(s):  
Total Energy ◽  
Energy Systems

scholarly journals Commercial applications of solar total energy systems. Volume 3. Conceptual designs and market analyses. Final report

1978 ◽  
Author(s):  
M.G. Boobar ◽  
B.L. McFarland ◽  
S.J. Nalbandian ◽  
W.W. Willcox ◽  
E.P. French ◽  
...  
Keyword(s):  
Total Energy ◽  
Energy Systems ◽  
Final Report ◽  
Conceptual Designs ◽  
Commercial Applications

scholarly journals Energy System Contributions and Physical Activity in Specific Age Groups during Exergames

2020 ◽  
Vol 17 (13) ◽  
pp. 4905
Author(s):  
Seung-Bo Park ◽  
Minjun Kim ◽  
Eunseok Lee ◽  
Doowon Lee ◽  
Seong Jun Son ◽  
...  
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Heart Rate ◽  
Oxygen Uptake ◽  
Total Energy ◽  
Body Mass ◽  
Age Groups ◽  
Energy Systems ◽  
Energy System ◽  
Energy Demands

Exergames have been recommended as alternative ways to increase the health benefits of physical exercise. However, energy system contributions (phosphagen, glycolytic, and oxidative) of exergames in specific age groups remain unclear. The purpose of this study was to investigate the contributions of three energy systems and metabolic profiles in specific age groups during exergames. Seventy-four healthy males and females participated in this study (older adults, n = 26: Age of 75.4 ± 4.4 years, body mass of 59.4 ± 8.7 kg, height of 157.2 ± 8.6 cm; adults, n = 24: Age of 27.8 ± 3.3 years, body mass of 73.4 ± 17.8 kg, height of 170.9 ± 11.9 cm; and adolescents, n = 24: Age of 14 ± 0.8 years, body mass of 71.3 ± 11.5 kg, height of 173.3 ± 5.2 cm). To evaluate the demands of different energy systems, all participants engaged in exergames named Action-Racing. Exergames protocol comprised whole-body exercises such as standing, sitting, stopping, jumping, and arm swinging. During exergames, mean heart rate (HRmean), peak heart rate (HRpeak), mean oxygen uptake (VO2mean), peak oxygen uptake (VO2peak), peak lactate (Peak La−), difference in lactate (ΔLa−), phosphagen (WPCr), glycolytic (WLa−), oxidative (WAER), and total energy demands (WTotal) were analyzed. The contribution of the oxidative energy system was higher than that of the phosphagen or glycolytic energy system (65.9 ± 12% vs. 29.5 ± 11.1% or 4.6 ± 3.3%, both p < 0.001). The contributions of the total energy demands and oxidative system in older adults were significantly lower than those in adults and adolescents (72.1 ± 28 kJ, p = 0.028; 70.3 ± 24.1 kJ, p = 0.024, respectively). The oxidative energy system was predominantly used for exergames applied in the current study. In addition, total metabolic work in older adults was lower than that in adolescents and adults. This was due to a decrease in the oxidative energy system. For future studies, quantification of intensity and volume is needed to optimize exergames. Such an approach plays a crucial role in encouraging physical activity in limited spaces.

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