Baby boomers believe that middle age lasts until they are 70, finds study.
When questioned by researchers, the post-war generation said on average they felt 'old' only after entering their eighth decade.
Even then a quarter don't think they are past it until they are in their 80s, the study showed.
The findings suggested that in advanced years baby boomers retain their determination to cling to their youth. After drawing their pensions they are refusing to quietly see out their days as generations before them have.
Baby boomers, or those born between 1945 and 1963, have been called the luckiest generation ever after they enjoyed soaring house values, guaranteed pensions and lives of prosperity.
The US study found that three quarters of all baby boomers considered themselves to be middle-aged or younger, even if they were in their 60s. The average age at which they said they were old was 70.
"I wouldn't describe myself as old, I know I'm older and obviously not young," the Daily Mail quoted Marcelle D'Argy Smith, a baby boomer at 64, as saying.
"When you hit your 50s a new sense of freedom starts to creep in," the former editor of Cosmopolitan added.