According to SportsMD, an abdominal strain injury is healed when a person has regained full range of motion in the area without pain. The healing rate for this type of injury varies from one person to the next and depends in part on the severity of the injury. It is important to follow a doctor's instructions for resting the abdominal muscles so the area can heal quicker.
According to About.com, abdominal strains are difficult to treat because these muscles cannot easily be isolated for rest. Nevertheless, a person should do whatever is necessary to let the inflamed muscles rest and recuperate. This means that strenuous exercise and activities should be avoided. The level and time of treatment a person requires for this injury depends on whether the injury is mild, moderate or severe in nature. If there is mild discomfort, a person can still move normally without much pain. Moderate discomfort means there is still some ability to perform minor movements. Severe discomfort involves muscle spasms that make it painful to do normal activities.
SportsMD recommends following the acronym P.R.I.C.E. for treating an abdominal injury. P.R.I.C.E. stands for Protection, Rest, Ice, Compression and Elevation. The injured person should allow the muscles to rest by stopping strenuous activity. An ice pack should be applied to the area for at least 20 minutes, and once every two hours afterwards. Compression should be used if necessary and the area should be kept elevated.