Pietiläinen Emilia, Kyröläinen Heikki, Parkkola Kai, Luukkaala Tiina, Vasankari Tommi
Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
Center for Military Medicine, Helsinki, Finland.
Front Sports Act Living. 2025 Aug 22;7:1549980. doi: 10.3389/fspor.2025.1549980. eCollection 2025.
The primary objectives of the present individualized randomized controlled trial were to increase physical activity (PA) and improve physical fitness.
260 military employees around Finland participated. Two-thirds, (158), were randomized in the intervention and one-third, (101), in the control group. The intervention group used Exsed Movesense accelerometers linked to smartphones measuring PA and sleep for six months. They received feedback via a smartphone application, were encouraged to exercise during worktime for 2 hours/week, and participated in telephone counseling. The control group continued PA routines without the accelerometer or feedback. Measurements were taken at the baseline, 6-mo and 12-mo after the intervention. They included two-week RM 42-accelerometer measurements of PA, cardiometabolic biomarkers, body composition, physical fitness tests, and a questionnaire about stress and work ability for the intervention group at every point and for the control group at baseline and 12-mo. At the 6-mo, only PA was measured in the control group. Primary outcomes were changes in PA from baseline to 6-mo and 12-mo as well as changes in maximal oxygen uptake and fitness index from baseline to 12-mo. Secondary outcomes were changes in other parameters from baseline to 12-mo. The effect of the intervention on primary and secondary outcomes was analyzed using unadjusted generalised linear mixed model, accounting for a group-by-time interaction effect in all models.
There was no statistically significant group-by-time interaction regarding the measured parameters. However, amount the intervention group daily standing time (mean increase 18 min/day, 95% confidence interval [CI] 6-29 min/day) and maximal oxygen uptake (mean increase 2.15 ml/kg/min 95% CI 0.56-3.74 ml/kg/min) tended to increase during twelve months.
The intervention did not effectively change the primary outcomes, but showed encouraging trends and revealed the potential and challenges of the intervention developed to increase PA in a military workplace.
本个体化随机对照试验的主要目标是增加身体活动（PA）并改善身体健康状况。
芬兰各地的260名军事雇员参与了试验。三分之二（158人）被随机分配到干预组，三分之一（101人）被分配到对照组。干预组使用与智能手机相连的Exsed Movesense加速度计来测量PA和睡眠情况，为期六个月。他们通过智能手机应用程序接收反馈，被鼓励在工作时间每周锻炼2小时，并参加电话咨询。对照组继续其常规的身体活动，不使用加速度计或接收反馈。在干预前的基线、干预后6个月和12个月进行测量。测量内容包括为期两周的通过RM 42加速度计测量的PA、心脏代谢生物标志物、身体成分、体能测试，以及干预组在每个测量点和对照组在基线和12个月时关于压力和工作能力的问卷调查。在6个月时，对照组仅测量PA。主要结局指标是从基线到6个月和12个月时PA的变化，以及从基线到12个月时最大摄氧量和体能指数的变化。次要结局指标是从基线到12个月时其他参数的变化。使用未调整的广义线性混合模型分析干预对主要和次要结局的影响，所有模型均考虑组间时间交互效应。
在所测量的参数方面，没有统计学上显著的组间时间交互作用。然而，干预组的每日站立时间（平均增加18分钟/天，95%置信区间[CI]为6 - 29分钟/天）和最大摄氧量（平均增加2.15毫升/千克/分钟，95% CI为0.56 - 3.74毫升/千克/分钟）在十二个月期间有增加的趋势。
该干预措施并未有效改变主要结局，但显示出令人鼓舞的趋势，并揭示了为增加军事工作场所的PA而开发的干预措施的潜力和挑战。
