Physical activity and mental health: moving to feel better in your head

I sometimes go through periods where energy is lacking, or my mood is up and down, or my mind is heavy for no apparent reason. At these times, the idea of ​​doing sports can seem absurd, even impossible. And yet, it is precisely in these moments that physical activity can be the most powerful lever.

The link between physical activity and mental health is one of the best-documented areas of preventive medicine research. It's not a question of will or performance, it's a question of biology. When I move, my brain produces molecules that actually change my internal state. Here's how it works, and how I get the most out of it.

1. What happens in my brain when I exercise

Physical activity triggers a neurochemical cascade that directly affects my mood, stress levels and emotional resilience. These effects are not metaphorical, they are measurable.

2. Physical activity and depression: what the research says

The relationship between physical exercise and depression is one of the best established in preventive psychiatry. A reference meta-analysis published in the British Journal of Psychiatry (Rimer et al., 2012) covering 28 randomized studies concludes that physical exercise significantly reduces depressive symptoms, with an effectiveness comparable to that of drug treatment for mild to moderate depression.

What is particularly encouraging is that these effects are observed with modest exercise volumes. Three sessions of 30 minutes of moderate activity per week are enough to produce a measurable therapeutic effect after 4 to 8 weeks. There is no need to run a marathon or lift heavy weights.

• ●30% reduction in the risk of depression in physically active people (WHO, 2020)

• ●Comparable effectiveness to antidepressants for mild to moderate forms (Kvam et al., J'Affect Disord 2016)

• ●40% reduction in the risk of depressive relapse in patients who maintain regular activity (Babyak et al., Psychosom Med 2000)

• ●Beneficial effects observed from the first week of practice for mood and energy

3. Physical activity and anxiety: getting out of the rumination-tension cycle

Chronic anxiety is often characterized by a state of constant physical tension and repetitive thoughts that go around in circles. Physical exercise acts precisely on these two dimensions.

On a physical level, the effort allows you to “burn off” the excess adrenaline and cortisol accumulated by chronic stress. On a mental level, physical activity, especially rhythmic or mindful activity, captures attention and interrupts the flow of ruminations. This is what researchers call the attentional distraction effect.

• ●Walking in nature: a single 90-minute session of walking in a natural environment significantly reduces the activity of the medial prefrontal cortex, the area associated with ruminations (Bratman et al., PNAS 2015).

• ●Yoga and mind-body activities: combine physical effort, conscious breathing and mindfulness. They are particularly effective in reducing generalized anxiety.

• ●Running and cycling: moderate-intensity, rhythmic activities produce a natural meditative state that reduces hyperactivity of the sympathetic nervous system.

4. Which activities for which mental state?

All physical activities benefit mental health, but some are particularly suited to specific conditions:

5. How to start when I don't feel like it

This is the best-known paradox in movement psychology: it is precisely when I least want to move that it is most useful. And research on motivation shows that the desire to exercise rarely comes before exercise, it happens during or after.- The 5 minute rule: I give myself permission to stop after 5 minutes. In the vast majority of cases, once I get moving, I continue. Starting is the only real resistance.

• ●Minimize friction: put on my sports outfit the day before, choose an activity without traveling (walking from home), have a playlist prepared. Each friction eliminated doubles the chances of taking action.

• ●Kindness towards myself: 10 minutes of slow walking is infinitely better than nothing. I don't judge myself on intensity but on regularity.

• ●Rely on another: getting involved with a friend, a colleague or a coach significantly increases the chances of consistency. Social connection is a powerful driver of behavior.

  💡 Tips to remember

  1. Physical exercise releases serotonin, dopamine, endorphins and BDNF, the four molecules most directly involved in my emotional balance and my mental resilience.
  2. Three 30-minute sessions per week are enough to produce a measurable therapeutic effect on depressive symptoms after 4 to 8 weeks.
  3. I don't wait until I feel like it: the desire to move comes during exercise, rarely before. The 5 minute rule (just go for 5 minutes) is the best remedy for sports procrastination.
  4. Walking in nature significantly reduces the activity of the brain area associated with ruminations, even a single 90-minute session produces this effect.
  5. A health check allows me to assess the state of my mental health indicators (stress, sleep, mood) and to identify priority action levers, including appropriate physical activity.