How Exercise Changes Your Brain and Reduces Your Risk of Depression with Brendon Stubbs #97

Feb 12, 2020 Episode Page ↗
Overview

This episode features Brendon Stubbs, a world-leading researcher and clinical physiotherapist, discussing how movement impacts our brains and mental health. He shares evidence that physical activity is as effective as many interventions for preventing and treating mental health conditions.

At a Glance
28 Insights
1h 53m Duration
22 Topics
5 Concepts

Deep Dive Analysis

Introduction to Movement's Impact on Mental Health

Brendan Stubbs' Accidental Path to Mental Health Physiotherapy

Early Observations: Sedentary Lifestyles and Physical Health

First Research Attempt: Pedometers and Patient Empowerment

Patient Story: David's Recovery Through Physical Activity

The Value of Combining Clinical Practice and Research

Scientific Evidence for Movement's Mental Health Benefits

Physical Activity Reduces Future Depression Risk

Sedentary Behavior Can Cause Depressive Symptoms

Bridging the Gap: Translating Research into Clinical Practice

Exercise as an Effective Treatment for Clinical Depression

Immediate Brain Changes from Light Physical Activity

The Power of Small, Consistent Movement Changes

Dancing as a Beneficial Physical Activity Intervention

Strategies for Motivating Patients with Low Motivation

Multifactorial Mechanisms of Exercise's Mental Health Benefits

Exercise's Anti-Inflammatory Effects and Mental Health

Addressing Resource Gaps and Socioeconomic Factors

Comparing Different Exercise Types for Mental Health

The Crucial Role of Social Connection in Physical Activity

Brendan's Book: Exercise-Based Interventions for Mental Illness

Top Tips for Integrating Movement into Daily Life

Mind-Body Connection

This concept highlights that the mind and body are not separate entities but are deeply interconnected, influencing each other's health and well-being. Physical activity, for instance, affects not only physical health but also mental states and brain function.

Sedentary Behavior and Mental Health

This idea explains that prolonged sitting and a lack of movement can actively contribute to negative mental health outcomes. Research shows that enforced sedentary behavior can increase stress levels, depressive symptoms, and inflammation, even in otherwise healthy individuals.

Neuroplasticity

Neuroplasticity refers to the brain's remarkable ability to change its structure and function throughout life in response to experiences, learning, and physical activity. Regular movement can lead to tangible changes in brain areas like the hippocampus, influencing memory and emotional processing.

BDNF (Brain-Derived Neurotrophic Factor)

BDNF is a crucial protein in the brain that supports the survival of existing neurons and encourages the growth and differentiation of new neurons and synapses. Exercise increases BDNF levels, which is thought to contribute to improved cognitive function and mental well-being by fostering new nerve connections.

Chronic Unresolved Inflammation

Distinct from acute inflammation (the body's healing response to injury), chronic unresolved inflammation is a persistent, low-grade inflammatory state. This ongoing bodily stress can drive various chronic health problems, including some cases of depression, and exercise can act as a potent anti-inflammatory agent.

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Can very light activity impact brain function immediately?

Yes, just 10 minutes of very light activity, equivalent to gentle walking, can lead to meaningful changes in electrical activity within the hippocampus and other emotional processing areas of the brain, as shown in a randomized controlled trial.

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Does physical activity reduce the risk of developing depression?

Yes, a meta-analysis of over 260,000 people found that those who were most active were 15% less likely to develop depression, with those meeting government guidelines (150 minutes/week) showing a 30% reduced risk in the future.

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Can being sedentary actually cause depression?

Yes, randomized controlled trials on healthy young adults have shown that enforced sedentary behavior for as little as one week can increase stress levels and depressive symptoms, and after four weeks, can lead to increases in peripheral inflammation linked to depression.

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Is exercise as effective as cognitive behavioral therapy (CBT) for depression?

A large randomized controlled trial with over 900 people found that a 24-week exercise intervention was equally as effective as internet-delivered CBT in reducing symptoms for people with moderate depression, and both were significantly better than usual care.

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How quickly can exercise benefit mental health?

Benefits can be felt very quickly; a study in Japan demonstrated that just 10 minutes of light physical activity can result in meaningful changes in electrical activity within the hippocampus and other emotional processing areas of the brain.

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What are the mechanisms by which exercise improves mental health?

The benefits are multifactorial, involving neurobiological changes such as improved brain connectivity, increased hippocampus volume, higher BDNF levels, and reduced inflammation, as well as psychosocial factors like a sense of achievement, improved self-efficacy, and social connection.

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Does the type of exercise matter for mental health benefits?

While aerobic training has the most extensive research, both resistance training and mind-body interventions like yoga have shown benefits for various mental health conditions. Emerging evidence also highlights the importance of light physical activity, especially for adolescents.

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How important is social connection in physical activity for mental health?

Social connection and support are very powerful; a randomized controlled trial for people with severe mental illness showed that a weekly walking group fostered community, improved mental health, and increased physical activity among often isolated individuals.

1. Integrate Physical Activity

Integrate physical activity as a core strategy for improving mental health and as a viable intervention for existing mental health symptoms, as it is a credible option to prevent and treat mental health conditions.

2. Choose Enjoyable Activity

Select a physical activity that you genuinely enjoy and find pleasurable, as enjoyment is the key factor for long-term adherence and consistency in maintaining any behavior.

3. Focus on Small Changes

Concentrate on making small, achievable changes in your daily routine, because even minor, consistent actions can build agency, self-esteem, and lead to significant improvements, especially when motivation is low.

4. 10 Minutes Light Activity

Engage in just 10 minutes of light activity, such as gentle walking, as it can result in meaningful changes in electrical activity within the hippocampus and other emotional processing areas of the brain.

5. Track Daily Activity

Monitor and record your physical activity daily, for example, by tracking steps with a pedometer, to gain a sense of agency, achievement, and enhance self-esteem by observing objective progress.

6. Exercise Reduces Depression

Engage in exercise consistently for 12 to 16 weeks, as this can significantly and meaningfully reduce depressive symptoms over a relatively short period.

7. Regular Activity for Brain

Be regularly active, as consistent movement can change the size of the hippocampus, a crucial brain region involved in memory and emotion processing.

8. Exercise Reduces Inflammation

Engage in exercise, as it acts as a potent anti-inflammatory, reducing levels of inflammation in your body, which can contribute to mental health problems.

9. Exercise Despite Genetic Risk

Engage in physical activity even if you have a genetic predisposition to conditions like depression, as it can reduce the likelihood of developing them.

10. Avoid Sedentary Lifestyle

Actively avoid prolonged sedentary behavior, as being sedentary can actually cause depression and negatively impact mental well-being.

11. Maintain Regular Movement

Consistently continue moving regularly, even when feeling well, because stopping movement can lead to increased stress levels and negatively affect your mood.

12. Moderate Exercise Reduces Depression

Engage in moderate exercise, as individuals who do so are 30% less likely to suffer a depressive episode.

13. Combine Aerobic & Strength

Incorporating both aerobic exercise and resistance or strength training into your routine is beneficial, as both types have strong evidence for improving depressive symptoms.

14. Diverse Exercise for Mental Health

Explore various forms of exercise, including aerobic, resistance training, and mind-body interventions like yoga, as they are all beneficial for improving symptoms of depression, anxiety, and PTSD.

15. Light Activity Protects Mental Health

Engage in light physical activities, such as moving around or light playing, as this can protect against future mental health symptoms, particularly in adolescence.

16. Start with 5-Minute Dance

Begin with just five minutes of dancing daily, as this small, enjoyable change can improve mood, energy, and relationships, often leading to longer durations and other positive lifestyle shifts.

17. Cumulative Small Movements

Integrate small, cumulative movements throughout your day, such as getting up every 20-30 minutes or stepping outside for fresh air, as these can make a big difference to both physical and mental health.

18. Exercise Socially

Combine exercise with a social element, such as participating in group activities like Parkrun, to gain multiple benefits beyond just mental and physical health, including social connection and support.

19. Connect with Activity Groups

Seek out and connect with groups for physical activity, as this fosters a sense of community, belonging, and achievement, which are crucial for maintaining engagement and improving outcomes.

20. Move with Enjoyable Music

Combine your physical activity with enjoyable music, as this can enhance the experience, making movement more powerful and pleasurable.

21. Don’t Be Discouraged

Do not be discouraged if you cannot perform intense or long workouts, as even small amounts of activity are beneficial, and intense sessions are not the only way to achieve health benefits.

22. Evolve Your Activity

Continuously challenge yourself and adapt your physical activity routine as you progress, as this helps maintain engagement and ensures continued benefits over time.

23. Seek Specialist Guidance

For optimal outcomes in mental health, nutrition, or exercise interventions, seek guidance from trained specialists with appropriate backgrounds, such as exercise physiologists or dietitians.

24. Prioritize Lifestyle in Care

Healthcare professionals should prioritize and emphasize lifestyle interventions, including physical activity, in mental health care settings, as people in these environments are often sedentary and have numerous physical health complaints.

25. Initiate Movement for Connection

Clinicians or support individuals should initiate physical activities like walks or gym sessions with patients, as this creates a different dynamic, allowing them to open up and build therapeutic relationships focused on physical well-being.

26. Reduce Activity Barriers

Policymakers and community organizers should strive to create accessible and available physical activity interventions, actively reducing barriers to participation to ensure everyone can benefit.

27. Spread Movement Awareness

Spread the word about the profound benefits of movement for mental and physical health, to inspire others and contribute to a ‘movement revolution’.

28. Try Minimalist Footwear

Consider wearing minimalist shoes, such as Vivo Barefoot, as they can be beneficial for alleviating back, hip, and knee pain, and improving general mobility.

Just 10 minutes today of light activity can get meaningful changes in the emotional processing areas of your brain.

Brendan Stubbs

I believe that when we are healthier, we are happier because when we feel better, we live more.

Rangan Chatterjee

The people I've worked with, you know, patient service users, have always been the greatest teachers.

Brendan Stubbs

It's giving them the power to make a meaningful change each and every day, and they could write that down and see it for themselves.

Brendan Stubbs

We're trying to frame the conversation to be quite different around saying, how does physical activity and exercise make you feel? Does it make you feel good?

Brendan Stubbs

It is not a gap in evidence and knowledge. It's a gap in translation. It's a gap in action into real world.

Brendan Stubbs

Parkrun is a social intervention masquerading as a running event.

Rangan Chatterjee

Pedometer-Based Activity Program for Older Adults in Mental Health Ward

Brendan Stubbs
  1. Develop an educational session about the benefits of physical activity from a physical and mental health viewpoint.
  2. Provide pedometers to all participants.
  3. Set up a chart on the wall for participants to write up their daily step counts.
  4. Monitor and discuss scores weekly, fostering friendly competition and a sense of achievement among the group.

Community-Based Intervention for Severe Mental Illness

Brendan Stubbs
  1. Bring people together to discuss the benefits of an active lifestyle.
  2. Set people up with a health coach for bi-weekly meetings to talk about the benefits of an active lifestyle and address any barriers.
  3. Organize a weekly walking group where people could go out into an open space and walk together as a group.
30%
Reduced likelihood of depressive episode for moderate exercisers Mentioned in the episode summary and intro.
10 minutes
Duration of light activity for meaningful brain changes Equivalent to gentle walking, shown to change electrical activity in hippocampus and emotional processing areas.
15%
Reduced risk of developing depression for most active people Compared to the least active, from a meta-analysis of 46 studies following 260,000 people for 7.5 years.
30%
Reduced risk of developing depression for people meeting activity guidelines For those meeting 150 minutes/week, from a meta-analysis of 46 studies following 260,000 people for 7.5 years.
46
Number of individual studies in meta-analysis on depression risk Studies on how active people are and risk of developing depression.
260,000
Number of people in meta-analysis on depression risk People free from depression at baseline, followed for an average of 7.5 years.
7.5 years
Average follow-up period in meta-analysis on depression risk For 260,000 people in 46 individual studies.
Over 100,000
Number of people in UK Biobank genetic studies Showed a causal relationship between being more active and reduced depression risk, even with genetic predisposition.
1 week
Duration of enforced sedentary behavior to increase stress/depressive symptoms In healthy young adults, as shown in randomized controlled trials.
4 weeks
Duration of enforced sedentary behavior to increase stress, depression, and inflammation In healthy young adults, as shown in randomized controlled trials.
Over 30
Number of randomized control trials on exercise for depression Show exercise can significantly reduce depressive symptoms.
12 to 16 weeks
Time period for meaningful improvement in depressive symptoms with exercise Based on randomized control trials.
Over 900
Number of people in Mats Hallgren's 2016 RCT Comparing exercise, internet CBT, and usual care for moderate depression.
12 months
Follow-up period for Mats Hallgren's 2016 RCT For people with moderate depression.
24 week period
Duration of exercise intervention in Mats Hallgren's 2016 RCT Involving 2-3 sessions per week of 30 minutes moderate intensity exercise.
83
Number of studies on inflammatory profile in depression Published in ACTA in 2018, showing consistent inflammatory response in people with depression.