Description: Aggressive treatment of patients with whiplash doesn't speed their recovery, Canadian research suggests.

University of Toronto researchers examined the treatment received by almost 1,700 whiplash patients.

They found that increasing the intensity of care to more than two visits to a general practitioner, or adding chiropractic care to general practitioner care, was actually associated with slower recovery.

The results, published in the June issue of the journal Arthritis Care & Research, reaffirmed earlier findings by the same research team.

Whiplash is a common traffic crash-related injury that causes neck pain, headaches and other symptoms that can lead to significant disability and use of the health care system.

The study authors noted that practice guidelines recommend treatment shortly after a patients suffers whiplash and that effective care, if medically needed, can improve patient prognosis.

However, the researchers noted th