Even with frequent exercise, men sometimes find that they are still unable to achieve the chest muscle development that they desire. Pectoral implants shape, enlarge, and firm the chest muscles, helping to attain the look wanted while still having a natural appearance when the pectoral muscles are either flexed or relaxed. Results can be seen immediately. The implants are inserted under the original pectoral muscles via an incision in each underarm region, in the hair-bearing skin.