Health-E-News. July 2009
empowering you to optimal health
"Being a Chiropractic patient has really helped me immensely...lifting weights and seeing a Chiropractor on a regular basis has made me a better golfer. I've been going to Chiropractors for as long as I can remember. It's as important to my training
Chiropractic Adjustments Influence Heart Rate Variability
The study's authors explain that "the purpose of this study was to examine heart rate variability (HRV) in the presence or the absence of pain in the lower back, while receiving one chiropractic treatment at L5 from either a manually assisted mechanical force (Activator) or a traditional diversified technique spinal manipulation."
As part of the experiment, 51 participants were randomly assigned to a control group, two treatment groups, or two sham groups.
Results revealed that "all groups decreased in value except the control group that reacted in the opposite direction, when comparing the pretests and posttests for the high-frequency component."
The investigators conclude that "adjusting the lumbar vertebrae affected the lumbar parasympathetic nervous system output for this group of participants. Adaptation in the parasympathetic output, reflected by changes in high frequency, low frequency, and very low frequency, may be independent of type of adjustment. Therefore, the group differences found in the modulation of the HRV would seem to be related to the presence or absence of pain. The autonomic nervous system response may be specific and sensitive to its effectors organ."
JMPT - May 2009;32:277-86.
Decrease in Hormone Replacement Therapy Use Tied with Dramatic Drop in Heart Attacks
In 2002 a report by the Women's Health Initiative revealed that hormone replacement therapy (HRT) may significantly increase the risk of cardiovascular disease. Consequently, the use of HRT subsequently decreased. Now, a new report looks at weather this decrease has translated to a reduction in cardiovascular disease.
"After the 2002 report, the use of HRT in women aged 50 to 69 declined from more than 30 percent to less than 15 percent," explains lead study author Kanaka Shetty, MD.
They found that the decreased use of HRT did not reduce the number of hospitalizations or deaths from stroke. However, it was, linked to a decrease in acute myocardial infarction among women.
The study found that for every 10,000 additional HRT users in one year, there will be 25 more heart attacks. By comparison, the Women's Health Initiative found seven more heart attacks per 10,000 women on HRT in one year.
As for the non-effect on stroke figures, "We were surprised that HRT had such divergent effects on stroke and acute myocardial infarction in the overall population," Dr. Shetty notes.
Medical Care - May 2009;47:600-606.
Climate Change To Increase Respiratory Disease In Kids
More children will end up hospitalized over the next decade because of respiratory problems as a result of projected climate change, according to a new study presented at the Pediatric Academic Societies Annual Meeting in Baltimore, Maryland.
For this study, Perry Elizabeth Sheffield and colleagues calculated that by 2020, respiratory hospitalizations are projected to rise between 4% and 7% for children under two years old because of projected air pollution (ozone) increases.
"These significant changes in children's hospitalizations from respiratory illnesses would be a direct result of projected climate-change effects on ground-level ozone concentrations," said Dr. Sheffield. "This research is important because it shows that we as a country need to implement policies that both improve air quality and also prevent climate change because this could improve health in the present and prevent worsening respiratory illness in the future."
PAS - May 3, 2009
Neck Adjustments Help With Tight Hamstrings
Chiropractors have known that neck subluxations, producing tension in the neck muscles, can affect everything, including hamstring tension. A new report indicates that suboccipital muscle inhibition may benefit patients with short hamstring syndrome.
According to the study, "the sample (70 subjects = 47 male and 23 female) was randomly divided into a control group (n = 34) and an intervention group (n = 36). Mean sample age was 23.40 +/- 3.82 years. The control group was subjected to a placebo technique, whereas the intervention group was subjected to the suboccipital muscle inhibition technique. Pre and postintervention evaluation was used for the assessment of hamstring elasticity, and pressure algometry was also used (myofascial trigger points)."
The study's authors write: "According to the finger-floor distance test, the straight leg raise test, and the popliteal angle test, the suboccipital muscle inhibition technique modified the elasticity of the hamstring muscles for this group of subjects. The suboccipital muscle inhibition technique modifies the pressure algometry of the semimembranosus muscle but does not modify that of the semitendinosus muscle or biceps femoris."
JMPT - May 2009;32:262-69.
Positive Thinking Influences Return To Work After Whiplash Injury
A new report demonstrates that whiplash patients who expect to return to work quickly are significantly more likely to do so, compared with patients who have lower expectations.
The researchers "assessed early expectations for return to work in a cohort of 2,335 individuals with traffic-related whiplash injury to the neck."
"After adjusting for the effects of sociodemographic characteristics, initial pain and symptoms, post-crash mood, prior health status and collision-related factors, those who expected to return to work reported global recovery 42% more quickly than those who did not have positive expectations... Knowledge of return to work expectation provides an important prognostic tool to clinicians for recovery."
European Spine Journal - June 2009;18:893-99.
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