The Poroneals The peroneus longus and brevis run down the sides of the shins and they are known together as the peroneals. These muscles get worked when your heels are elevated which is similar to the calves. If your toes were to turn out, the peroneals would get worked harder.

The Tibialis Anterior The tibialis anterior muscles run down the front of the shins. They get built up when your toes point up instead of down. This motion is called dorsiflexion and it takes place when your leg is in front of your body right before your foot lands on the ground. When you first start running, this area can become sore. This soreness is kn[...]

The entire rectus abdominis that run along the center of your abs and the oblique muscles along your sides get activated when you run. They contract to give support and balance to the body. The intercostals are muscles found in between the ribs. They also become toned when you breath heavily during running.

The Hip Flexors The hip flexors get worked when your thighs move toward your stomach. You experience this motion after your foot leaves the ground behind you and your thigh comes upward before the next foot plant. The three parts of the hip flexors are the psoas major, psoas minor and iliacus.