A new study points to a simple tool that can assist smokers during the most difficult moments of smoking cessation: A few minutes of physical activity. According to a systematic review and meta–analysis that included dozens of clinical trials, short physical activity succeeded in significantly reducing the craving for a cigarette immediately after the workout, and the effect lasted for up to 30 minutes.
The practical significance is clear: Instead of fighting the urge when it is at its peak, going for a brisk walk, a short ride, or a brief workout at home might create a window of time in which it is easier to hold out without smoking.
The study, published in the Journal of Sport and Health Science, examined 59 randomized controlled trials that included 9,083 participants. The researchers separated two types of interventions: Physical activity training over time, which was tested in 43 studies, and a one–time, short physical activity, which was tested in 16 studies. All the studies dealt with cigarette smokers, and no studies were found that directly examined cessation from electronic cigarettes.
The sharpest finding concerned moments of acute craving to smoke. A single physical activity, lasting between 5 and 30 minutes, reduced the craving for nicotine immediately after its completion. The effect was also observed after 10 minutes, 20 minutes, and even 30 minutes. The researchers found that the effect was stronger the more intense the activity was: High–intensity activity reduced the urge to the greatest extent, moderate–intensity activity was also effective, whereas light activity showed a smaller and not always significant effect.
The possible explanation for this is related to mechanisms in the brain and the nervous system. Physical activity affects reward, mood, and stress systems, among other things through changes in dopamine, serotonin, endorphins, and cortisol. These are the same systems that are also involved in nicotine addiction and the feeling of temporary relaxation that smokers attribute to a cigarette. In simple words: Physical activity may provide the brain with an alternative stimulus that briefly reduces the need for nicotine.
Regarding prolonged cessation, the picture is encouraging but more moderate. Physical activity training over time increased the chance of continuous abstinence from smoking by 15% compared to control groups, and the chance of abstinence from smoking for seven days by 21%. Meanwhile, the studies that examined the daily number of cigarettes found an average decrease of slightly more than two cigarettes a day among those who incorporated physical activity.
However, the researchers are careful not to present physical activity as a standalone solution for cessation. The quality of evidence regarding the reduction in the number of cigarettes and the reduction of acute cravings was rated as moderate, but the evidence regarding prolonged cessation was rated lower, mainly due to large variability between the studies, differences in types of workouts, intervention durations, measurement methods, and some methodological limitations. Some of the studies relied on self–reporting by the participants and not always on biochemical verification, such as a carbon monoxide breath test or cotinine tests.
The meaning for smokers is not to replace proven treatments with a walk in the park. Medicinal treatments such as nicotine replacements, varenicline, or bupropion, along with behavioral counseling, remain among the central tools for smoking cessation. But physical activity may join them as an everyday aid, especially when the urge erupts suddenly: After coffee, following stress, while driving, after a meal, or during a break at work.
The great advantage of physical activity is availability. It does not require a prescription, does not necessitate a doctor's appointment, and can be performed almost anywhere. Even those who are not in shape can start with small steps: A brisk walk around the building, climbing stairs, a short bicycle ride, a brief workout in front of a video, or a few minutes of simple strength exercises. According to the study's findings, there is no necessity to start with a long workout. Rather, the short response to the moment of crisis is one of the most practical findings.
The researchers note that a central gap remaining open is the vaping world. Despite the rise in electronic cigarette use, none of the studies included in the review examined whether physical activity assists in cessation from vaping or in dual use, both regular cigarettes and electronic cigarettes. This is a significant deficiency, especially in light of the growing use of nicotine products among young people and adults.