Adolescence can be a difficult period of life characterised, among many other things, by a significant increase in depressive symptoms among girls. Recent studies have suggested that sedentary habits and self-determined motivation can be associated with depressive symptoms. The main goal of the present study was to examine the associations between physical activity levels, sedentary behaviours, and self-determined motivation and depressive symptoms in girls during adolescence. A total of 714 adolescent girls (16.53 ± 1.01 years) agreed to participate in the study. They completed a questionnaire including the scale of depressive symptoms, the International Physical Activity Questionnaire, and the Situational Motivation Scale. Participants’ smoking habits and body mass index were also assessed. Results showed that those adolescents who performed physical activity of moderate (odds ratio (OR): 0.55; 95% confidence interval (CI): 0.31, 0.99) or high intensity level (OR: 0.22; 95% CI: 0.10, 0.21) had a significantly lower probability of suffering from depressive symptoms. Accordingly, the most sedentary group had a higher probability of suffering from depressive symptoms (OR: 4.90; 95% CI: 2.00, 11.54). Vigorous self-determined motivation was also a significant predictor of the lowest levels of depressive symptoms. In conclusion, results seemed to indicate that educators should promote the most self-determined types of motivation and physical activity habits in their students if they want to help prevent depressive symptoms.

青春期可能是人生中的一个艰难时期，其中许多特征是女孩的抑郁症状明显增加。最近的研究表明，久坐的习惯和自我决定的动机可能与抑郁症状有关。本研究的主要目的是检查青春期女孩的体育活动水平，久坐行为和自我决定的动机与抑郁症状之间的关系。共有714名少女（16.53±1.01岁）同意参加该研究。他们完成了一份调查问卷，包括抑郁症状量表，国际体育锻炼问卷和情境动机量表。还评估了参与者的吸烟习惯和体重指数。结果显示，那些进行中度（优势比（OR）：0.55; 95％置信区间（CI）：0.31，0.99）或高强度水平（OR：0.22; 95％CI：0.10，0.21）的体育活动的青少年患有抑郁症状的可能性大大降低。因此，久坐不动的人群患抑郁症状的可能性更高（OR：4.90； 95％CI：2.00，11.54）。强烈的自我决定动机也是抑郁症状最低水平的重要预测指标。总之，结果似乎表明，教育工作者如果想帮助预防抑郁症状，应该在学生中培养最自定的动机和体育锻炼习惯。99）或高强度水平（OR：0.22; 95％CI：0.10，0.21）患抑郁症状的可能性大大降低。因此，久坐不动的人群患抑郁症状的可能性更高（OR：4.90； 95％CI：2.00，11.54）。强烈的自我决定动机也是抑郁症状最低水平的重要预测指标。总之，结果似乎表明，教育工作者如果想帮助预防抑郁症症状，应该在学生中培养最能决定自己的动机和体育锻炼习惯。99）或高强度水平（OR：0.22; 95％CI：0.10，0.21）患抑郁症的可能性大大降低。因此，久坐不动的人群患抑郁症状的可能性更高（OR：4.90； 95％CI：2.00，11.54）。强烈的自我决定动机也是抑郁症状最低水平的重要预测指标。总之，结果似乎表明，教育工作者如果想帮助预防抑郁症症状，应该在学生中培养最能决定自己的动机和体育锻炼习惯。强烈的自我决定动机也是抑郁症状最低水平的重要预测指标。总之，结果似乎表明，教育工作者如果想帮助预防抑郁症症状，应该在学生中培养最能决定自己的动机和体育锻炼习惯。强烈的自我决定动机也是抑郁症状最低水平的重要预测指标。总之，结果似乎表明，教育工作者如果想帮助预防抑郁症症状，应该在学生中培养最能决定自己的动机和体育锻炼习惯。