Haldane

Work/Power

Energy Expenditure

Enter the required information into the blank squares and you will recieve the answers in the grey squares.
!!!WRITTEN BY AMON SOERINK!!!

WORKING OUT HOW MUCH WE BREATH INTO THE DOUGLAS BAG Enter the amount of air breathed into the douglas bag Enter the time breathed into the douglas bag Litres per min This is how we can put the figures into our calculator. Ve ATPS = Douglas bag volume / Time of Collection Ve ATPS = / =

WORKING OUT VE (STPD) AND BTPS We can now work out two standards. Ve STPD = Ve ATPS x 273/(273+T) x (Pb-Pw)/760 Ve BTPS = Ve ATPS x 310/(273+T) x (Pb-Pw)(Pb-47) Enter the bp Enter the lab temp in deg: Enter the Water/Vapour pressure in mmHg: Ve= BTPS = This is how we can put the figures into our calculator. Ve STPD = Ve ATPS x 273/(273+T) x (Pb-Pw)/760 Ve = x 273 / (273+ ) x ( - ) / 760 = Ve BTPS = Ve ATPS x 310/(273+T) x (Pb-Pw)(Pb-47) Ve BTPS = x 310 / ( 273 + ) x ( - )( - 47) =

WORKING OUT OUR Vi, Vo2, Vco2 AND RER We can then work out the Vi STPD by placint VE STPD into our new formula after we enter the fration of expired O2 and CO2. Vi = Ve STPD x (1-(Fe02 + FeC02))/0.7904 Enter fraction of expired O2: Enter fraction of expired CO2: Vi= This is how we can put the figures into our calculator. Vi = Ve STPD x (1-(Fe02 + FeC02))/0.7904 Vi = x( 1 - ( + )) / 0.7904 =   We now have Vi, so we can put this into our formula's to get Vo2 and VCo2 Remember that we know FVi o2 and FVi Co2 as this is the amount that is present in the air. What we already know as this is what is the amount we breath from the air. FVi o2 = 0.2093 and FVi co2 = 0.0003 Vo2 = (Vi x FVi o2) - (Ve STPD x Fe o2) Vco2 = (Ve x Fe co2) - ( Vi x FVi Co2) Vo2=   This is how we can put the figures into our calculator. Vo2 = (Vi x FVi o2) - (Ve STPD x Fe o2) Vo2 = ( x 0.2093) - ( x )= Vco2 =   This is how we can put the figures into our calculator. Vco2 = (Ve x Fe co2) - ( Vi x FVi Co2) Vco2 = ( x ) - ( x 0.0003) = Once you have V02 and VC02 you can then calculate the RER By dividing VC02 by V02 RER = VCO2 / V02 RER = This is how we can put the figures into our calculator. RER = VCO2 / V02 RER = / =

WORKING OUT OUR RELATIVE Vo2 AND Vco2 By dividing the persons body weight we can now work out the relative Vo2 and Vco2 compared to body weight. Relative Vo2 = Vo2 x 1000 / Body weight in Kg Relative Vco2 = Vo2 x 1000 / Body weight in Kg Enter the persons body weight in Kg: Relative Vo2= Relative Vco2= This is how we can put the figures into our calculator. Relative Vo2 = Vo2 x 1000 / Body weight in Kg Relative Vo2 = x 1000 / = Relative Vco2 = Vo2 x 1000 / Body weight in Kg Relative Vco2 = x 1000 / =