Biomaterial Database

Energy expenditure during oxygen deficit of submaximal concentric and eccentric exercise. 1980

P Pahud, and E Ravussin, and K J Acheson, and E Jequier

Aerobic (MR) and anaerobic (Man) energy production was determined in five subjects during the 1st min of concentric and eccentric exercise (steady-state energy expenditure approximately 415 W in both situations). Man was obtained by solving the heat balance equation, MR + Man - S = (R + C + E) +/- parallel to W parallel to, all other variables of which could be measured [S is heat storage; (R + C + E) are the radiative, convective, and evaporative heat losses; and W is work output]. The size of the O2 deficit was similar whatever the type of exercise (99 +/- 19 W concentric and 102 +/- 19 W eccentric). MR + Man was lower than the steady-state MR in both types of exercise (concentric; 364 +/- 19 and 407 +/- 24 W, respectively, and eccentric; 346 +/- 25 and 430 +/- 21 W, respectively). The size of the O2 deficit during the 1st min of muscular exercise is imposed by the steady-state energy requirement whatever the type of exercise. The smaller energy expenditure during this phase is probably due to less energy being released when creatinge phosphate is split without resynthesis (O2 deficit) than during splitting and resynthesis of high-energy phosphate bonds (steady state).

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D010100	Oxygen	An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.	Dioxygen,Oxygen-16,Oxygen 16
D001833	Body Temperature Regulation	The processes of heating and cooling that an organism uses to control its temperature.	Heat Loss,Thermoregulation,Regulation, Body Temperature,Temperature Regulation, Body,Body Temperature Regulations,Heat Losses,Loss, Heat,Losses, Heat,Regulations, Body Temperature,Temperature Regulations, Body,Thermoregulations
D004734	Energy Metabolism	The chemical reactions involved in the production and utilization of various forms of energy in cells.	Bioenergetics,Energy Expenditure,Bioenergetic,Energy Expenditures,Energy Metabolisms,Expenditure, Energy,Expenditures, Energy,Metabolism, Energy,Metabolisms, Energy
D005082	Physical Exertion	Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.	Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man