Which service has the toughest physical fitness test and professional appearance standards?

Whether it's readiness training, daily physical fitness or job-specific tasks, which service truly puts themselves to the grind harder? How do we measure the athleticism in the services? Being a Soldier, I go with the Army overall being the toughest in the long haul with the Marines being tougher for the short careerist. The Navy have the Navy Seals which is by far the toughest of elite forces, but Air Force requires phenomenal feats of individual physical fitness to fly the jets. Finally, I want nothing to do with guarding our coast lines and fighting drug trafficking and illegal smuggling all alone in the deep dark waters of our shores. I think this is tough, but I am going with Army.