The hardening of the stomach when walking in late pregnancy may be due to false contractions, which may or may not be normal at this time.
In late pregnancy, the fetus is larger, due to the stimulation of walking may cause the uterus to temporarily appear contractions, if the contractions at this time the degree of light, each time the duration of a shorter period of time, and there is no fixed regularity, does not affect the normal life, then belongs to the pseudo-contractions, it is more normal, do not need special intervention.
However, if the contractions continue to intensify, each episode lasts for a long time, accompanied by abdominal pain, it may be a sign of impending labor, you need to go to the hospital as soon as possible, please ask a professional doctor to determine the time of labor, so as not to delay the condition.