Once, during my lengthly military career, I helped a female Army nurse get promoted to Major. She was having trouble with the 2-mile run and situps to pass a PT test to be submitted with her promotion packet. She was very busty and had no trouble doing pushups. I was amazed at the difference in running times and situp iterations needed for her to pass the PT test. All she wanted to do was pass...I think the minimum score was 180. I ran with her 3 days a week and held her ankles when she did situps. I pushed her real hard. Most of the time I was walking fast and shuffling because of the slow time needed for her to pass the 2-mile run. I always wondered why there was a big difference between the mens requirements and the women's.