Introduction-Smoking during pregnancy is common, and quitting at any point during pregnancy can yield benefits to both the fetus and mother. Smoking cessation is typically followed by withdrawal symptoms and a strong desire to smoke, both of which are likely to contribute to relapse. Research has shown that a bout of exercise minimizes cravings and tobacco withdrawal symptoms (TWS) after temporary abstinence in smokers, but these findings have not been replicated in pregnant smokers. This study examined the effect of 20 min of exercise on cravings (primary outcome) and TWS (secondary outcomes) among temporary abstinent, inactive pregnant smokers.Methods-Thirty female smokers (Mean(M) age = 25.7 years, Standard Deviation(SD) = 5.5; M weeks pregnant = 18.2, SD = 5.3; Fagerstrom Test for Cigarette Dependence = 3.3, SD = 2.2; M 9.3 cigarettes/day, SD = 4.7; M hours abstained = 17.2, SD = 2.8) were randomized to 20 min of mild-to-moderate intensity exercise (EC; n = 14) or passive (PC; n = 16) condition. Cravings and TWS were assessed immediately before, during (at 10 min), immediately post, and at 10, 20, and 30 min post-condition.Results-A 2 (condition) × 6 (time) repeated measures ANOVA revealed that the EC significantly (p < 0.05) reduced cravings (ή 2 = 0.46) compared with the PC, across time. Nonsignificant, but nevertheless, large effects were evident favouring the EC over time for TWS ☆ Editorial board for Addictive Behaviors.
*Corresponding author at: University of Western Ontario, Faculty of Health Sciences, School of Kinesiology, Thames Hall/3M Centre, London, Ontario, Canada, N6A 3K7. Tel.: +1 519 661 2111x80173. hprapave@uwo.ca (H. Prapavessis). Contributors HP, GF, PS, MM, and MU conceived the study. SDJ, AC, TH and LF recruited participants and conducted the study in London, ON. MU recruited participants and collected the study in London, England. HP and SDJ ran the statistical analyses and prepared the first draft of the manuscript, which were jointly interpreted and edited by the authors, respectively. All authors contributed to and approved the final version of the manuscript.
Conflict of interestMy coauthors and I do not have any personal or financial conflicts of interest related to the research, nor do the authors have other relationships with other people or organizations within three years of beginning the submitted work that could inappropriately influence, or be perceived to influence, this work.
CIHR Author ManuscriptCIHR Author Manuscript CIHR Author Manuscript restlessness (ή 2 = 0.34), stress (ή 2 = 0.24), irritability (ή 2 = 0.21), tension (ή 2 = 0.15), and depression (ή 2 = 0.14).Conclusions-Consistent with previous research, this study reveals that in pregnant smokers, a bout of exercise is associated with a reduction in cravings and similar patterns exist for TWS. Therefore, exercise may have the potential to assist in the initial stages of smoking cessation attempts during pregnancy.