Sport and addictions: how physical activity supports withdrawal pathways

Addiction, whether to alcohol, tobacco, drugs, screens, or other substances, is not a lack of willpower. It is a neurobiological pathology that profoundly modifies the brain circuits of reward, motivation and impulse control. These changes make quitting extraordinarily difficult and relapse extremely likely without specific support.

In this context, physical activity is gradually being recognized by research as a valuable complementary therapeutic tool in withdrawal and relapse prevention pathways. It is not a magic solution, it does not replace specialized treatments. But it acts on biological mechanisms directly involved in addiction, with well-documented effects.

1. Addiction and the brain: why it’s so difficult to quit

The neurobiological understanding of addiction has completely transformed our vision of these pathologies over the past twenty years. Addictive substances and addictive behaviors act directly on the mesolimbic reward circuit, in particular on the dopaminergic neurons of the nucleus accumbens:

• ●The artificial dopamine peak: addictive substances release quantities of dopamine 2 to 10 times greater than natural rewards (food, sex, social connection). This artificial peak reprograms the brain to favor substance to the detriment of everything else.

• ●Tolerance: the brain adapts by reducing the number of dopamine receptors available. The same amounts of substance produce increasingly weaker effects, requiring increasing doses to maintain the same effect.

• ●Withdrawal and dysphoria: in the absence of a substance, dopamine and serotonin levels drop well below baseline, creating a state of unease, irritability and withdrawal that powerfully pushes towards relapse.

• ●Craving and triggers: the brain's associative circuits associate the substance with specific contexts, emotions and stimuli. These associations persist long after stopping and constitute the main cause of relapse.

2. How exercise acts on the addiction circuits

Physical activity acts on the same neurobiological circuits as addictive substances, but in a healthy and non-toxic way. This is the basis of its therapeutic interest:

3. Data by type of addiction

Specific studies by type of addiction document the benefits of exercise:

• ●Alcohol: a meta-analysis published in Substance Abuse Treatment, Prevention and Policy (Wang et al., 2014) covering 22 studies concludes that physical exercise significantly reduces alcohol consumption, withdrawal symptoms and cravings. Moderate aerobic exercises are the most effective.

• ●Tobacco: a Cochrane meta-analysis (Ussher et al., 2019) on exercise and smoking cessation concludes that exercise reduces craving acutely and can reduce withdrawal symptoms. A 5-minute session is enough to reduce smoking cravings for 5 to 50 minutes.

• ●Illicit drugs: Studies on cocaine, heroin, and cannabinoids show that aerobic exercise reduces substance-seeking behaviors in animal models, and preliminary human studies are encouraging.

• ●Behavioral addictions (games, screens): exercise reduces the stimulation-seeking behaviors (sensation seeking) that underlie these addictions, by offering an alternative source of dopaminergic stimulation.

4. Exercise as a craving management toolCraving, the irresistible urge to consume, is the main obstacle to withdrawal and the main cause of relapse. Physical exercise is one of the best-documented tools for managing it in real time:

• ●The immediate effect on craving: a session of 5 to 10 minutes of brisk walking or moderate exercise reduces craving measurably and immediately, through attentional distraction and release of endogenous dopamine.

• ●The interruption of the rumination-craving cycle: craving is often fueled by cognitive ruminations. Exercise, especially outdoors, interrupts this cycle by directing attention to bodily sensations.

• ●Management of trigger stress: stress is the main trigger for relapse. Regular exercise reduces reactivity to stress, thereby indirectly reducing the frequency and intensity of stress-induced craving.

• ●Self-efficacy: each exercise session completed reinforces the feeling of ability to control one's behavior, a direct transfer of self-efficacy towards the management of desires to consume.

5. Integration into a care pathway

Physical activity is not a first-line treatment for addiction, it is part of a multidisciplinary approach including medical monitoring, psychotherapy (notably CBT) and social support.

• ●When to start: from the first weeks of weaning, gentle activities (walking, yoga) are beneficial and accessible even in the event of fatigue or discomfort. The intensity can increase gradually.

• ●Sport as a replacement ritual: identify the moments of the day when the craving is strongest and plan physical activity at that time. The sporting ritual gradually replaces the consumption ritual.

• ●The social environment of sport: joining a sports group offers a substitute social bond for consumption groups, and an environment incompatible with the substance.

A health assessment can include an assessment of addictive behaviors and referral to appropriate resources, including adapted physical activity as a component of a prevention and withdrawal program.