190424-N-GW654-1025 SAN DIEGO (April 24, 2019) Chief Aviation Electronics Technician Saleem Hasan, front, command fitness leader aboard the aircraft carrier USS Theodore Roosevelt (CVN 71), demonstrates proper curl-up technique during the spring 2019 physical readiness test at Naval Station North Island. Theodore Roosevelt is homeported in San Diego. (U.S. Navy photo by Mass Communication Seaman Olympia O. McCoy/Released)