How much blood flows to skeletal muscles during exercise?
Blood flow to tissues is generally propoional to metabolic activity. At rest, approximately 20% of CO is distributed to the skeletal muscle. However, during physical activity, the majority (85%) of the increased CO is diveed to the working muscles. This represents an increase from 4 to 7 to 50 to 75 mL/min of blood per 100 g of muscle. Ref: Fletcher G.F., Flipse T.R., Safford R.E. (2011). Chapter 100. Exercise in Health and Cardiovascular Disease. In V. Fuster, R.A. Walsh, R.A. Harrington (Eds), Hurst's The Hea, 13e.
50 to 75 mL/min of blood per 100 g of muscle
4 to 7 mL/min of blood per 100 g of muscle
20 to 30 mL/min of blood per 100 g of muscle
10 to 20 mL/min of blood per 100 g of muscle