This analysis aimed to (1) identify longitudinal joint trajectories of participation in organized and unorganized physical activity contexts, and level of daily moderate‐to‐vigorous physical activity (MVPA) and (2) assess whether basic psychological need satisfaction during adolescence differentiates between membership in different physical activity trajectories. Participants (n = 888; 56% girls) reported their involvement in 36 different physical activities, level of MVPA, and their perceived satisfaction of competence, autonomy, and relatedness satisfaction in physical activity up to three times per year, over 8 years (from ages 10 to 17 years). Group‐based multi‐trajectory models were used to identify longitudinal joint trajectories of physical activity participation. We estimated a multinomial logistic regression model for membership in a physical activity trajectory by including individual‐level intercepts and slopes for each psychological need obtained using mixed models over the 24 cycles modelized as natural cubic splines. Five longitudinal trajectory groups emerged: Non‐participants, Dropouts, Active in unorganized physical activities, Active in organized physical activities, and Active through a variety of activities. Relative to Non‐participants, we identify a dose–response relationship in baseline competence and membership in the higher active trajectory groups. In addition, a positive change in competence in early adolescence predicted membership in all three Active trajectory groups.

中文翻译：

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与青春期身体活动轨迹相关的基本心理需求满足


该分析旨在 （1） 确定参与有组织和无组织体育活动背景的纵向关节轨迹，以及每日中度至剧烈体育活动 （MVPA） 的水平，以及 （2） 评估青春期的基本心理需求满足是否区分不同体育活动轨迹的成员。参与者 （n = 888;56% 女孩） 报告了她们参与 36 种不同的体育活动、MVPA 水平，以及他们对能力、自主性和关联性的满意度 体育活动满意度 每年最多 3 次，超过 8 年（从 10 岁到 17 岁）。基于组的多轨迹模型用于识别参与体育活动的纵向关节轨迹。我们通过包括使用建模为自然三次样条的 24 个周期的混合模型获得的每种心理需求的个人水平截距和斜率，估计了身体活动轨迹中成员身份的多项式 logistic 回归模型。出现了五个纵向轨迹组：非参与者、辍学、活跃于无组织的体育活动、活跃于有组织的体育活动和活跃于各种活动。相对于非参与者，我们确定了基线能力和较高活跃轨迹组成员身份的剂量-反应关系。此外，青春期早期能力的积极变化预测了所有三个 Active 轨迹组的成员身份。