This study examined if physical activity (PA) and self-determination theory's basic psychological needs directly or interactively predict older adults' eudaimonic well-being. Participants aged ≥55 years completed five online surveys. At baseline (T₁), participants (N = 430) reported on autonomy, competence, and relatedness experienced during PA. PA was assessed prospectively using the Physical Activity Scale for Elderly (recall period = 7 days) for four consecutive weeks (T₂, T₃, T₄, and T₅); weekly PA scores were averaged. At T₅, purpose in life and personal growth were measured using Ryff's scales of psychological well-being. In regression analyses, PA was associated with purpose in life for those reporting low relatedness (b = .04, p = .02). Competence was associated with purpose in life only for those high in relatedness (b = .34, p < .001). Autonomy was positively associated with personal growth for those who also reported high competence. Multiple imputation analyses (N = 430) and sensitivity analyses (n = 304) yielded findings consistent with those from complete cases (n = 182). Encouraging older people to move more may not be sufficient to confer well-being. It may be necessary to help people engage in activities that support their basic psychological needs.

中文翻译：

---

人生目的和个人成长：身体活动和基本心理需求的独特共同贡献

这项研究检验了身体活动 (PA) 和自决理论的基本心理需求是否直接或交互地预测老年人的幸福感。年龄≥55 岁的参与者完成了五次在线调查。在基线 (T ₁ ) 时，参与者 ( N  = 430) 报告了 PA 期间经历的自主性、能力和相关性。使用老年人体力活动量表（回忆期 = 7 天）连续 4 周（T ₂、T ₃、T ₄和 T ₅）对 PA 进行前瞻性评估；平均每周的 PA 分数。在 T ₅, 生活目标和个人成长是使用 Ryff 的心理健康量表来衡量的。在回归分析中，对于那些报告相关性较低的人来说，PA 与生活目标相关（b  = .04，p  = .02）。只有那些相关性高的人才能与生活目标相关联（b  = .34，p  < .001）。对于那些也报告高能力的人来说，自主性与个人成长呈正相关。多重插补分析 ( N  = 430) 和敏感性分析 ( n  = 304) 得出的结果与完整病例 ( n = 182)。鼓励老年人多活动可能不足以带来幸福感。可能有必要帮助人们参与支持其基本心理需求的活动。