The adductor muscles of the legs are in the inner part of the thighs. They attach from the pelvis to the inner thigh bone (femur) and knee. As they are named, they adduct, or bring the leg toward the midline. Short adductors include the adductor longus, adductor brevis, and the pectineus muscles, while the long adductors include the adductor magnus and gracilis muscles. Each adductor group has its own unique stretch.
The short adductors attach from the pubic bone to the inner thigh. A great stretch for these muscles is called the frog stretch, which I demonstrate in the video below. There are three levels of this stretch, each one giving a little extra length to the short adductors.
Although some people have weak adductors, which require strengthening, many people get tight adductors instead. If your adductors are tight, try the frog stretch; and if you are unsure, try the frog stretch as well–it will let you know if you have tight adductors. Have fun.