Meiner Christina Birch, Eckert Caroline, Aggestrup Charlotte Sandager, Pfeffer Kristina, Koch Sofie, Thøgersen-Ntoumani Cecilie, Ntoumanis Nikos, Krustrup Peter, Larsen Malte Nejst
Department of Sports Science and Clinical Biomechanics, Sport and Health Sciences Cluster (SHSC), Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
DIF Udvikling, Danmarks Idrætsforbund (DIF), Brøndby, Danmark.
J Sports Sci. 2025 Aug;43(15):1480-1489. doi: 10.1080/02640414.2025.2505380. Epub 2025 May 16.
To evaluate the effects of a 10-week thrice-weekly FIT FIRST Teen (FFT) intervention on cardiorespiratory fitness in Danish 12-15-years-olds.
A cluster-randomised controlled study.
One thousand four hundred and seventeen Danish pupils (51.1% female) from 15 municipal schools, allocated to an intervention group (FFT: = 994, 13.5 (0.6) years (mean (SD)), 165.8 (8.7) cm, 57.8 (13.4) kg) or a usual practice control group (CON: = 423, 13.8 (0.8) years, 167.7 (11.5) cm, 58.6 (12.2) kg).
The FFT group completed three weekly 40-min FFT sessions with modified, motivating, involving, high-intensity sports-based activities. Before and after the 10-wk intervention period resting heart rate and blood pressure, body composition, postural balance, standing long jump and performance on the Yo-Yo intermittent recovery level 1 children's test (YYIR1C) were measured. Group effects for all outcome variables were tested using multi-level linear mixed models.
The group effect analyses showed no significant differences between FFT and CON in the YYIR1C test ( = 0.080). A significant small difference between groups was found in resting heart rate ( = 0.29, = 0.039) in favour of FFT. No significant between-group differences were observed in body composition, or the remaining cardiovascular or physical fitness variables ().
The lack of significant effects for the majority of the outcome measures calls for further development and long-term testing of the programme.
评估为期10周、每周三次的FIT FIRST青少年（FFT）干预对丹麦12至15岁青少年心肺适能的影响。
一项整群随机对照研究。
来自15所市立学校的1417名丹麦学生（51.1%为女性），分为干预组（FFT：n = 994，平均（标准差）年龄13.5（0.6）岁，身高165.8（8.7）厘米，体重57.8（13.4）千克）或常规对照组（CON：n = 423，年龄13.8（0.8）岁，身高167.7（11.5）厘米，体重58.6（12.2）千克）。
FFT组每周完成三次40分钟的FFT课程，内容为经过改良、具有激励性、趣味性且高强度的体育活动。在为期10周的干预期前后，测量静息心率、血压、身体成分、姿势平衡、立定跳远以及Yo-Yo间歇恢复水平1儿童测试（YYIR1C）的表现。使用多水平线性混合模型测试所有结局变量的组间效应。
组间效应分析显示，FFT组和CON组在YYIR1C测试中无显著差异（P = 0.080）。在静息心率方面发现组间存在显著的微小差异（P = 0.29，效应量 = 0.039），FFT组更优。在身体成分、其余心血管或体能变量方面未观察到显著的组间差异（P值未给出）。
大多数结局指标缺乏显著效果，这需要对该项目进行进一步开发和长期测试。
