Informed sources say Victoria Beckham's weight loss is not caused by a rumored secret diet, but a crippling back injury that forces her to stay home.

Reports have claimed Beckham is on a secret "five hands" diet, that sheds weight quickly by only consuming five handfuls of food each day. But according to reliable sources, "Posh Spice" is not forcing her body to return to a size zero, and that the weight loss was caused by a slipped spinal disc.

"The cruel reality is she was suffering with a bad back throughout her ­pregnancy, and then something untoward happened during the C-section, badly aggravating it." a source told Mirror.co.uk. "She has had an X-ray which showed she has slipped a disc in her lower back. Victoria is in a lot of pain and even struggling to hold Harper." continues the source in the same post.

"When she goes to breastfeed, David has to basically prop up the baby. But Victoria is trying to remain upbeat because she really does feel so blessed with the birth of her beautiful daughter." continues the source in the same Mirror.co.uk post. "She is determined not to let this injury overshadow the happiness surrounding Harper's arrival."

In yesterday's post, a report claimed that the ex-pop star is rushing her body to return to a size 0 for the September release of her spring/ summer fashion line.

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