<prompt> The main cause of increased blood flow to exercising muscles isRaised blood pressureVasodilatation due to local metabolitesIncreased sympathetic discharge to peripheral vesselsIncreased hea rate  <response>: 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 