," says Dr Brian Krabak, a sports medicine and rehabilitation specialist at Johns Hopkins University in Baltimore, USA.The gluteus maximus and gluteus medius are the two large muscles in the buttocks that propel you forward and support the hip joint
, according to Pribut, who treats runners in Washington DC in the USA. Your calves lift the heels about 1,500 times every mile, and your shins support the arches, raise the toes and absorb impact. Because the propulsive motion of running works the rear
