Vigorous exercise, even a trek up Everest, may be safe during pregnancy

Female athletes seem to be able to exercise safely and intensively both before and during pregnancy without increasing their risk for birth-related complications, even if they are trekking up Mount Everest, according to two eye-opening new studies.
 
Together, the new research undercuts widely held beliefs about strenuous physical training and pregnancy.
 
As anyone who has experienced pregnancy knows, it is physically taxing. That cherished little fetus-slash-vampire requires a share of its mother’s blood, fuel and oxygen.
 
The mother’s body adapts to the child’s needs, adding blood vessels and volume, but the environment inside the womb remains almost