Appleton Institute, Central Queensland University, Rockhampton, Queensland, Australia
Faculty of Medicine, Dentistry and Health Science, The University of Melbourne, Parkville, Victoria, Australia.
Br J Sports Med. 2021 Mar;55(6):336-343. doi: 10.1136/bjsports-2020-102521. Epub 2020 Nov 3.
Some online, personally tailored, text-based physical activity interventions have proven effective. However, people tend to 'skim' and 'scan' web-based text rather than thoroughly read their contents. In contrast, online videos are more engaging and popular. We examined whether web-based personally tailored physical activity videos were more effective in promoting physical activity than personally tailored text and generic information.
501 adults were randomised into a video-tailored intervention, text-tailored intervention or control. Over a 3-month period, intervention groups received access to eight sessions of web-based personally tailored physical activity advice. Only the delivery method differed between intervention groups: tailored video versus tailored text. The primary outcome was 7-day ActiGraph-GT3X+ measured moderate-to-vigorous physical activity (MVPA) assessed at 0, 3 and 9 months. Secondary outcomes included self-reported MVPA and website engagement. Differences were examined using generalised linear mixed models with intention-to-treat and multiple imputation.
Accelerometer-assessed MVPA increased 23% in the control (1.23 (1.06, 1.43)), 12% in the text-tailored (1.12 (0.95, 1.32)) and 28% in the video-tailored (1.28 (1.06, 1.53)) groups at the 3-month follow-up only, though there were no significant between-group differences. Both text-tailored (1.77 (1.37, 2.28]) and video-tailored (1.37 (1.04, 1.79)) groups significantly increased self-reported MVPA more than the control group at 3 months only, but there were no differences between video-tailored and text-tailored groups. The video-tailored group spent significantly more time on the website compared with text-tailored participants (90 vs 77 min, p=0.02).
The personally tailored videos were not more effective than personally tailored text in increasing MVPA. The findings from this study conflict with pilot study outcomes and previous literature. Process evaluation and mediation analyses will provide further insights.
ACTRN12615000057583.
一些在线的、个性化的、基于文本的身体活动干预措施已被证明是有效的。然而，人们往往倾向于“浏览”和“扫描”网络文本，而不是仔细阅读其内容。相比之下，在线视频更具吸引力和人气。我们研究了基于网络的个性化身体活动视频是否比个性化文本和通用信息更能有效地促进身体活动。
501 名成年人被随机分配到视频个性化干预组、文本个性化干预组或对照组。在 3 个月的时间里，干预组可以访问 8 节基于网络的个性化身体活动建议。只有干预组之间的交付方式不同：个性化视频与个性化文本。主要结果是使用 ActiGraph-GT3X+ 在 0、3 和 9 个月时测量的 7 天中度至剧烈体力活动（MVPA）。次要结果包括自我报告的 MVPA 和网站参与度。使用意向治疗和多重插补的广义线性混合模型来检查差异。
仅在 3 个月的随访中，对照组的加速度计测量的 MVPA 增加了 23%（1.23（1.06，1.43）），文本个性化组增加了 12%（1.12（0.95，1.32）），视频个性化组增加了 28%（1.28（1.06，1.53）），但组间无显著差异。仅在 3 个月时，文本个性化组（1.77（1.37，2.28））和视频个性化组（1.37（1.04，1.79））自我报告的 MVPA 均显著高于对照组，但视频个性化组和文本个性化组之间无差异。与文本个性化组相比，视频个性化组在网站上花费的时间明显更多（90 分钟对 77 分钟，p=0.02）。
个性化视频与个性化文本相比，在增加 MVPA 方面没有更有效。本研究的结果与初步研究结果和以往文献相冲突。过程评估和中介分析将提供进一步的见解。
ACTRN12615000057583。
