Table 27.3: Fuel sources for muscle contraction

Fuel source

Maximal rate of ATP production (mmol s−1)

Total ~P available (mmol)

Muscle ATP

 

223

Creatine phosphate

73.3

446

Conversion of muscle glycogen into lactate

39.1

6,700

Conversion of muscle glycogen into CO2

16.7

84,000

Conversion of liver glycogen into CO2

  6.2

19,000

Conversion of adipose-tissue fatty acids into CO2

  6.7

4,000,000

Note: Fuels stored are estimated for a 70-kg person having a muscle mass of 28 kg.

Data from E. Hultman and R. C. Harris. In Principles of Exercise Biochemistry, edited by J. R. Poortmans (Karger, 2004), pp. 78–119.