 One capacity, 45% less muscle mass. This is equivalent to putting a woman in a mixed martial arts cage with a man. She can never equally defend herself. Everyone says if she can complete the training, she should be able to do it. The fact is, is the training never ends. The Marine Corps did a study, and the integrated units were only 60% as effective. The infantry ground combat units were only 60% as effective as non-integrated units.