Boomers lost a significant chunk of their retirement nest eggs in the recession, but it was members of Generation X who were really hit the hardest, according to a report released Thursday.

If they don't start paying off debt and saving more, Gen Xers (those between the ages of 38 and 47) and younger Boomers (those in their late 40s to mid-50s) are on track to retire financially worse off than the generations before them, according to analysis from the Pew Charitable Trusts, a Washington, D.C.-based nonprofit.

"Many younger Americans were already behind in saving for retirement, and suddenly millions of them were out of work or owned homes worth far less than they had been just a few years earlier," the report said.

Including Social Security benefits, Gen Xers are projected to have enough money in retirement to replace only half of their annual pre-retirement earnings. Financial planners recommend retirement savers aim to replace 70% to 100% of pre-retirement income.

Between 2007 and 2010, members of Gen X saw their median net worth sink 45% from $75,077 to $41,600. That's compared to a drop of around 25% for both younger Baby Boomers and older Boomers, between the ages 58 and 67.

By the end of the recession, Gen X held investments, retirement plans and savings with a median value of just $14,500, down from $19,382 in 2007. Younger Boomers had median savings of $32,135 and older Boomers had $55,850, according to the report.

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