The main cause of increased blood flow to exercising muscles is
During prolonged exercise blood flow to skeletal muscle will increase up to 20 times this is called exercise hyperemiaThis is made possible by local metabolite induced vasodilationRef: Medical Physiology Indu Khurana 2015 edition, Page No:276
Raised blood pressure
Vasodilatation due to local metabolites
Increased sympathetic discharge to peripheral vessels
Increased hea rate
Cardiovascular system