The comments came following Defense Secretary Ashton Carter's decision in December to open all jobs to women. He did so despite the Marine Corps lobbying to keep closed some physically demanding jobs, like machine gunner and reconnaissance man.
The service did so citing a nine-month study it carried out last year at Camp Lejeune, N.C., and Twentynine Palms, Calif., to assess how women perform when integrated into units that are typically all men. It found that, on average, women who participated were injured twice as often as men, less accurate with infantry weapons and not as good at removing wounded troops from the battlefield.
The newly opened jobs, like infantryman, regularly call for Marines to carry in excess of 100 pounds on their back. Other jobs, like tank crewman, require them to load rounds of ammunition or weapons that can weigh dozens of pounds each.
The research, which included about 300 men and 100 women, has been criticized by Navy Secretary Ray Mabus and other advocates of full gender integration for not specifying how the top women performed. But it did offer specifics on the women involved, noting that they weighed on average 142 pounds with 24 percent body fat. Men in the group weighed 178 pounds on average with 20 percent body fat.
According to height-and-weight standards published by the Marine Corps in 2008, the maximum weight for women who are 5-foot-3 is 141 pounds. Taller women are allowed to weigh more, with the weight limit set at 164 pounds for a woman who is 5-foot-8 and 184 for a woman who is 6 feet tall.
By comparison, male Marines are allowed to weigh more but must maintain a lower body fat composition. A man in the service is allowed to weigh up to 180 pounds at 5 foot 8, and up to 202 pounds at 6 feet tall. Waivers can be granted to men and women who are over those limits if their commander approves a waiver, but it's a process that has long left some Marines uneasy.
The service also has specific criteria for body fat composition. For example, a woman who is 26 or under is allowed to have up to 26 percent, while a man that age is allowed to have up to 18.
Neller said he already sees male Marines who fall outside of weight regulations, but have body fat that rivals professional athletes.
"These guys are big," he said. "I ask, 'Are you within weight for your height, and they just laugh at me. They say, 'No.' And I say, 'What's your body fat?' And they say, 'Fifteen.' That's like NFL-caliber."