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A No-Brainer - Exercise Improves Mental Health

11/19/2012

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If you're anything like me and you use exercise for stress relief, you easily understand that exercise boosts mental health. But, again, now there's proof! Exercise warded off a relapse of major depression in patients with Major Depressive Disorder (MDD) as much as SSRI's (selective serotonin reuptake inhibitors) after 4 months and even prevented significantly less relapses than SSRIs after 10 months! This means that exercise is as effective in the short term for preventing relapses of MDD and even MORE EFFECTIVE than SSRIs in preventing them over 10 months.

"One study of a jogging intervention among 80 inpatients with chronic schizophrenia, in which 40 patients jogged for 40 minutes 3 times a week, depression, anxiety, phobia, and obsessive-compulsive behaviors declined significantly compared with 40 inpatient control participants who were inactive and showed no improvement". Now imagine if inpatient psychiatry centers implemented mandatory physical fitness...rates of readmissionHard to find drugs with this kind of staying power! And the side effects of exercise (besides injury) are almost nil. Yet another reason to get out and get active! See below for the full article

source:
http://www.medscape.com/viewarticle/774639?src=nldne

SAN DIEGO, California – The benefits of exercise in nearly every aspect of physical health are well known, but evidence in recent years suggests a unique effect on some psychiatric disorders, prompting mental health clinicians to rethink treatment strategies and to consider the possibility of exercise not just in therapy but as therapy.

"Above and beyond the standard benefits of exercise in healthy living and general well-being, there is strong evidence demonstrating the ability of exercise to in fact treat mental illness and have significant benefits on a neurotrophic, neurobiologic basis," Douglas Noordsy, MD, told delegates attending Psych Congress 2012: US Psychiatric and Mental Health Congress.

Some of the strongest evidence is seen in depression, where psychiatric benefits from exercise have been shown in some cases to match those achieved with pharmacologic interventions and to persist to prevent remission in the long term.

Dr. Noordsy referenced a study from researchers at Duke University in which 156 patients with major depressive disorder (MDD) were randomly assigned either to aerobic exercise, sertraline therapy (50 mg to 200 mg), or both for 4 months.

The difference in remission rates in the exercise and selective serotonin reuptake inhibitor (SSRI) groups after 4 months were not significant – 60% and 69%, respectively, but at a 10-month follow-up, the exercise group showed a significantly lower relapse rate ( P = .01) ( Psychosom Med 2000;62:633-638).

"The patients who were independently exercising on their own after the treatment period had half the odds for meeting the depression criteria 6 months later compared to patients who didn't exercise after the 4-month study," said Dr. Noordsy, an associate professor and director of psychosis services at the Geisel School of Medicine at Dartmouth College, in Hanover, New Hampshire.

A similar study from the same group of researchers 10 years later in a larger sample involving 202 patients assigned to supervised exercise, sertraline therapy (50 mg to 200 mg) or placebo showed remission rates of 46% at 4 months and 66% at the 16-month follow-up across both treatment groups, with no significant greater improvement with SSRIs compared with exercise in predicting MDD remission at 1 year ( Psychosom Med 2011 Feb-Mar;73:127-33; epub 2010 Dec 10).

Other studies have shown equally impressive results in exercise for a variety of populations, including pregnant women with depression, who have a high interest in avoiding medications, people with HIV, and even patients with heart failure, who showed not only a significant reduction in depression related to exercise but also reduced mortality ( Am J Cardiol 2011;107:64-68).

Anxiety

The evidence in relation to anxiety, although not as strong, still suggests a benefit, and the rigors of a cardiovascular workout seem particularly suited to addressing the physiologic effects associated with anxiety, Dr. Noordsy said.

"We know that with anxiety, the heart rate goes up, you start breathing fast, and it kind of snowballs with more anxiety, and that can trigger a panic attack," he explained.

"So one of the important positive effects of physical exercise is it allows people to become conditioned to having their heart rate and respiratory rate increase when they're not associated with anxiety, thereby addressing the triggers."

Evidence is somewhat lacking in the area of bipolar disorder, but patients often have symptoms similar enough to depression to suggest a benefit, Dr. Noordsy said.

"The evidence on depression in bipolar disorder is strong enough that I certainly feel comfortable in talking about exercise as part of [bipolar patients'] management."

In terms of more serious psychotic disorders such as schizophrenia, evidence is limited on benefits of exercise for the core symptoms of psychosis or cognition. However, several studies have shown improvement in comorbidities and metabolic issues related to antipsychotics that such patients commonly face.

One study of a jogging intervention among 80 inpatients with chronic schizophrenia, in which 40 patients jogged for 40 minutes 3 times a week, depression, anxiety, phobia, and obsessive-compulsive behaviors declined significantly compared with 40 inpatient control participants who were inactive and showed no improvement.

Dementia Prevention

The evidence on the benefits of exercise in cognitive function disorders, such as dementia and Alzheimer's disease, is much more extensive, with as many as 8 strong studies on dementia alone in the last 3 years showing improvements with activities such as walking and strength training on memory and executive function.

Dr. Noordsy noted one particularly remarkable study in which researchers compared patients with and without the ApoE gene, which is linked strongly to late-onset Alzheimer's disease.

In the study, patients who were ApoE-negative showed similarly low mean cortical binding potential, related to plaque buildup in the brain, regardless of whether they exercised or not.

But although ApoE-positive individuals (n = 39) had values that were substantially higher, the ApoE-positive patients who exercised (n = 13) had values similar to those who did not carry the gene ( Arch Neurol 2012;69:636-643).

"You could look at these results and rightfully say physical exercise neutralizes your risk for developing Alzheimer's disease if you're ApoE positive," Dr. Noordsy said.

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    Dr. Maltz earned a Medical Degree and Master in Public Health from the University of Texas Medical Branch (UTMB) in Galveston, TX. She completed a combined Internal and Preventive Medicine Residency at UTMB in June, 2011. She then completed a 2-year Integrative Medicine Fellowship at Stamford Hospital in Stamford, CT, during which she simultaneously underwent an intensive 1000-hour curriculum created by The University of Arizona Integrative Medicine Program founded by Dr. Andrew Weil.  

    Dr. Maltz's specific interests include helping her patients and populations improve their health through lifestyle interventions including, but not limited to, natural pain relief, nutrition, mind-body techniques and decreasing environmental exposures. She spent the last year of her four-year medical residency participating in health policy, cancer prevention and environmental health rotations and enjoys guiding people through the overwhelming amount of health information available on the web.

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