Frequent aerobic exercise cuts schizophrenia negative symptoms – Study

More good news on exercise this morning. Writing in the British Psychological Society Research Digest, Emma Young reports positive news on the move more section of our eat less; move more; live longer mantra.

Aerobic exercise – any activity that gets your heart pumping harder – improves mood, anxiety and memory. It can help people with major depressive disorder, bipolar disorder and anxiety disorder. Now there’s evidence, from a randomized controlled trial published in Frontiers in Psychiatry, that a program of regular aerobic exercise also reduces psychopathology in people diagnosed with schizophrenia. And it seems to have a particular impact on so-called “negative” symptoms, such as apathy and loss of emotional feeling, which are not improved by standard drug treatments.

people doing marathon

Photo by Snapwire on Pexels.com

“[W]hile antipsychotics [drug treatments] are essential in treating schizophrenia, interventions other than antipsychotic treatment…may be needed to achieve better outcomes,” write the authors of the new study, led by Peng-Wei Wang at Kaohsiung Medical University Hospital in Taiwan.

The researchers recruited 62 patients, all of whom had received a diagnosis of schizophrenia at least a year ago, and whose anti-psychotic medication dosage had been stable for at least three months. These participants were randomly allocated into either an aerobic exercise group (30 minutes of “vigorous” aerobic exercise, taking into account each participant’s maximum heart rate) or a control group who performed stretching exercises (25 minutes of flexibility, toning and balance exercises), with a goal of five sessions a week, for 12 weeks. Not all participants managed to stick to the minimum requirement of three sessions per week for the full three months. But 24 in the exercise group and 22 in the control group did complete the study.  (There were no significant differences in gender make-up, age of onset of schizophrenia, or mean dosage of anti-psychotics between the two groups.)

A psychiatrist who was blind to the group allocations used a standard schizophrenia symptom evaluation scale to interview and evaluate all the participants at the start of the study; at the end of the 12 week intervention; and again, three months on. The control group showed no improvements in positive (e.g. hallucinations and delusions) or negative symptoms, or general psychopathology, during the intervention or the follow-up period. But for the aerobic exercise group, it was a different story.

Over the 12-week intervention, their overall psychopathology and level of negative and positive symptoms decreased. Three months later, these improvements had been maintained (and, in the case of negative symptoms, actually continued to improve). Also, the more severe their negative symptoms and general psychopathology at the start of the study, the bigger their improvements by the end.

“These results imply that [aerobic exercise] could be a good non-pharmacotherapeutic intervention for antipsychotic-treated patients with schizophrenia,” the researchers conclude.

There are various possible explanations for the effects. Vigorous exercise can boost levels of the neurotransmitter glutamate (other work has found that enhancing glutamate function can improve negative symptoms of schizophrenia); increase levels of brain-derived neurotrophic factor (which is involved in repairing damaged brain cells and triggering the growth of new ones; low levels of BDNF are associated with symptoms of schizophrenia); and also help regulate the hypothalamic-pituitary-adrenal (HPA) axis – the stress response system. “HPA dysfunction is an important characteristic in schizophrenia,” the authors note.

But is a one-off 12-week program really enough to produce lasting – and even escalating – improvements?

The researchers did not collect data on how much exercise the aerobic group did in the three months between the end of the 12-week intervention and the final assessment. If the participants continued to exercise, this may have accounted for the ongoing improvements. Future research will have to explore this. But if an exercise program does have to be maintained, given all the manifold benefits, surely that’s no bad thing.

Effect of Aerobic Exercise on Improving Symptoms of Individuals With Schizophrenia: A Single Blinded Randomized Control Study

6 Comments

Filed under aging brain, brain, brain function, brain health, cardio exercise, Exercise, exercise and brain health, exercise benefits, schizophrenia

6 responses to “Frequent aerobic exercise cuts schizophrenia negative symptoms – Study

  1. Interesting they didn’t manage to stick with the minimum requirements over the 3 months and yet it still made an improvement to their health. I think I underestimate just how powerful and important exercise is most of the time.

    Liked by 2 people

    • Thanks for your comment. I write about the benefits of exercise regularly here. Check back on the posts to read further, particularly the exercise benefits for your brain – and aging.

      Like

  2. I love this! Embracing what’s within our individual control benefits everyone. Especially those feeling out of control via mental illness. Great resource!

    Liked by 2 people

  3. I’ve said this before, but the mental and emotional benefits of exercise are my favorites. Running brought me through a very rough time during my teenage years, and exercise is still my go-to “cure” for any kind of bad emotional or mental state. When I get grumpy, my wife always says, “You need to go run or workout.”

    Liked by 1 person

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s