What did Winston do during the Physical Jerks

It is time for his morning Physical Jerks, an exercise routine implemented to all Party members through the telescreen, specifically tailored for each age group. Winston falls among the 30s to 40s group. After overcoming his daily morning coughing fit, Winston begins the exercise routine, but lets his mind wander to the history of Oceania. He can't remember a time when Oceania wasn't at war, but he remembers being quite young and rushing to an underground Tube station with his parents and little sister to take shelter during an attack - although he cannot remember the source of the attack. Next, he remembers an era of common London street fighting, and then only an era of permanent war. Winston remembers that only four years ago Oceania was at war with Eastasia, even though it is currently at war with Eurasia and claims this has always been the case. Such was the nature of doublethink - completely accepting the opposite of the known truth and adjusting one's personal memories accordingly. Winston realizes that the past has been not altered, but rather destroyed. Suddenly, a voice from the telescreen interrupts him, yelling out his name and identification number and urging him to "bend lower." Feigning interest and determination, Winston complies, and succeeds in touching his toes for the first time in many years.