Can Physical Exercise Improve Mood? Discover How

Have you ever finished a heavy day, feeling physically tired and mentally overwhelmed, and decided to take a walk—even if you didn’t feel like it? You might have noticed that upon returning, something felt different. Your mind felt a bit lighter, and your chest less tight. This sensation is neither coincidence nor self-persuasion: it is grounded in decades of scientific research on the relationship between movement and mental well-being.

The connection between body and mind is deeper than we often realize in our daily lives. For a long time, physical health and mental health were treated as separate fields—but science has consistently shown that they influence each other all the time. What we do with our bodies affects how we feel inside, and vice versa.

In this article, we will explore what scientific research suggests about the impact of physical exercise on mood, how this process occurs in the body, what types of activities can help, and, most importantly, how to approach this practice realistically and kindly—without miraculous promises or unnecessary pressures.

What Happens in the Brain During Exercise?

When we move, the body springs into action in ways that go far beyond the muscles. In the central nervous system, exercise stimulates the release of substances that play important roles in mood regulation.

One of the most well-known is endorphin, often associated with the famous “runner’s high”—that feeling of well-being after intense activity. But the story is more complex than just endorphins. Researchers identify other important players:

• Serotonin: a neurotransmitter linked to emotional balance, sleep, and appetite. Studies suggest that physical activity can contribute to its production.
• Dopamine: related to motivation, pleasure, and reward. Its release during and after exercise may help explain why physical activity often improves mood.
• Norepinephrine: involved in stress response and attention. Exercise seems to influence its functioning, which may contribute to greater mental clarity.
• BDNF (brain-derived neurotrophic factor): a protein researchers call “brain fertilizer.” Studies suggest that exercise stimulates its production, and it is associated with neuron health and processes like learning and memory.

  It’s important to note that neuroscience is an ever-evolving field. What we know today is that these processes are complex and vary among individuals—hence, the effect of exercise on mood is not identical for everyone.

  What Do Studies Say About Exercise and Mood?

  The relationship between physical activity and mental health is one of the most studied areas in recent decades. Systematic reviews and meta-analyses—which analyze sets of studies—suggest that regular exercise can contribute to reducing symptoms of mild to moderate anxiety and depression, as well as improving overall mood and sleep quality.

  The World Health Organization (WHO) recognizes physical activity as an important component for mental health and, in its guidelines, recommends that adults engage in regular physical activity as part of a healthy lifestyle—not as an isolated treatment, but as part of broader care.

  It’s important to clarify: studies suggest an association between exercise and mood improvement, not an absolute and universal cause-and-effect relationship. Exercise does not replace medical or psychological treatment when needed. For individuals with diagnosed mental disorders, physical activity can be a valuable complementary resource—but always in conjunction with professional health care.

  What Types of Exercise Can Help?

  The good news is that there doesn’t seem to be a single or “superior” type of exercise for mental well-being. What studies suggest is that moving regularly, in an enjoyable and sustainable way, tends to be more relevant than following a specific protocol.

  Some examples that frequently appear in research:

  • Walking: accessible, can be done outdoors (adding the benefit of contact with nature), requires no equipment, and is adaptable to different fitness levels.
  • Running and aerobic activities: among the most studied in relation to mood. Studies suggest a positive effect, especially when practiced regularly.
  • Weight training and resistance exercises: more recent research indicates that activities with weights can also contribute to mood and self-esteem improvement.
  • Yoga and mind-body practices: combine movement, breathing, and attention, with initial evidence of benefits for anxiety and stress—although research in this area is still developing.
  • Dancing, team sports, swimming: beyond the movement itself, they involve social and playful aspects that also contribute to well-being.

    The most important thing is to find an activity that you can do regularly and that doesn’t feel like a punishment.

    Beyond Neurotransmitters: Other Important Mechanisms

    The impact of exercise on mood is not solely explained by biochemistry. There are other pathways through which movement can contribute to how we feel:

    • Reduction of stress hormones: cortisol, the main hormone linked to stress, tends to decrease after moderate exercise sessions. This can create a sense of relief and relaxation.
    • Improved sleep: regular physical activity is associated with better quality sleep, and good sleep has a direct impact on mood and emotional regulation.
    • Sense of self-efficacy: completing an activity—even a short one—can create a sense of achievement and boost confidence in one’s abilities.
    • Social connection: engaging in group activities, classes, or with friends can reduce isolation, which is an important risk factor for emotional distress.
    • Functional distraction: moving the body can interrupt cycles of rumination (those loops of negative thoughts) by directing attention to the present moment.

      To complement your self-care routine, you might also be interested in relaxation exercises to practice at home, which can be allies of movement in caring for well-being.

      How to Start (or Restart) Gently

      If you’re going through a difficult emotional time, the idea of “exercising” might seem like an additional demand—especially when motivation is low. And that’s completely understandable. Lack of energy to move is often one of the symptoms for those who could benefit most from movement.

      Here are some ideas to make starting more accessible:

      1. Start small, without judging yourself. A ten-minute walk already represents movement. There is no minimum threshold for it to “count.”
      2. Choose something you enjoy, or dislike less. No one is obliged to run if they prefer dancing in their living room.
      3. Associate movement with something enjoyable. A favorite podcast, a playlist, a beautiful path—creating a pleasant context can help.
      4. Don’t wait for motivation to start. Often, motivation comes after the movement, not before. This is normal.
      5. Be consistent, not perfect. Three times a week, sustainably, tends to be more effective than an intense effort followed by abandonment.
      6. Respect your body. Pain, excessive discomfort, or extreme fatigue are signs to slow down and, if necessary, consult a professional.
         

         When to Seek a Health Professional

         Physical exercise can be a valuable self-care resource—but it does not replace evaluation and professional follow-up, especially in certain situations:

         • If you feel persistent sadness, anxiety, or distress that affects your daily life, seek a psychologist or psychiatrist.
         • If you want to start physical activity and have pre-existing health conditions (joint pain, cardiovascular diseases, history of injuries), consult a doctor first.
         • If lack of motivation for any activity lasts for weeks, accompanied by other symptoms like changes in sleep, appetite, or isolation, this deserves professional attention.
         • If exercise starts to feel like a distressing obligation or if you notice difficult relationships with movement and body image, a professional can help understand this pattern.

           Remember: seeking help is an act of care, not weakness. If you are experiencing intense suffering, know that support exists. In Brazil, the CVV (Centro de Valorização da Vida) offers free assistance at 188, 24 hours a day. In emergency situations, seek medical attention immediately.

           If you want to better understand how therapy can be part of this care, check out our article What is Therapy and Why is it Important for You.

           Conclusion

           

           The movement of the body and the state of the mind are in constant dialogue. Science suggests that regular physical exercise can contribute to more stable mood, stress reduction, and a general sense of well-being—not as a magical solution, but as part of broader self-care.

           It’s not about running marathons or transforming your life overnight. It’s about finding ways to move that fit your reality, that you can sustain, and that make sense to you. With kindness, without haste, and with attention to what your body and mind need.

           Each person is unique, and the path to well-being is individual. Therefore, in addition to exploring movement as an ally, don’t hesitate to seek support from health professionals—they are there to help on this journey.

           This content is informative and educational, and does not replace evaluation, diagnosis, or treatment by a qualified health professional. Always consult a doctor, psychologist, or other health professional for specific guidance for your case.