Department of Biostructure, University School of Physical Education in Wroclaw, Al. I.J. Paderewskiego 35, 51-612 Wroclaw, Poland.
Department of Team Sports Games, University School of Physical Education in Wroclaw, Al. I.J. Paderewskiego 35, 51-612 Wrocław, Poland.
Biomed Res Int. 2021 Feb 24;2021:6675416. doi: 10.1155/2021/6675416. eCollection 2021.
The optimal body mass index (BMI) and fat mass index (FMI) values for a positive change or the lowest risk of no positive change after high-intensity interval training (HIIT) using the Tabata protocol remain unclear. This study is aimed at establishing these optimal BMI and FMI values for the lowest risk of failure of aerobic performance in adolescents.
A 10-week HIIT programme was introduced into the physical education of 73 students. BMI was calculated using height and weight. Bioelectrical impedance analysis measured body fat, and the InBody apparatus generated the FMI. Based on BMI and FMI, the participants were divided into four groups. Pre- and post-HIIT intervention analyses were carried out using the Harvard step test, which was used to determine the physical efficiency index (PEI).
The Youden index confirmed that the risk of no positive effects in PEI was the lowest for the second BMI interval (19.01-22.00 kg/m) and FMI (7.96-8.91 kg/m). The optimal BMI value for the lowest risk of no change in PEI was 20.60 kg/m, and the optimal FMI value was 8.84 kg/m.
A comparison of the two indices shows that FMI had stronger effects on PEI than BMI. In addition, the model obtained for FMI had higher accuracy. Identifying at-risk individuals, those in need of improving health-related fitness (H-RF), and those with a low risk of poor H-RF allows for efficient planning of individual intervention services and training programmes.
高强度间歇训练（HIIT）使用塔巴塔方案后，对于积极变化或无积极变化的最低风险，最佳体重指数（BMI）和脂肪质量指数（FMI）值仍不清楚。本研究旨在为青少年有氧能力失败风险最低的情况下确定这些最佳 BMI 和 FMI 值。
在 73 名学生的体育课中引入了为期 10 周的 HIIT 方案。使用身高和体重计算 BMI。生物电阻抗分析测量体脂，InBody 仪器生成 FMI。根据 BMI 和 FMI，将参与者分为四组。使用哈佛台阶测试对 HIIT 干预前后进行分析，用于确定身体效率指数（PEI）。
Youden 指数证实，PEI 无积极影响的风险最低，BMI 处于第二区间（19.01-22.00 kg/m），FMI 处于（7.96-8.91 kg/m）。PEI 无变化风险最低的最佳 BMI 值为 20.60 kg/m，最佳 FMI 值为 8.84 kg/m。
两个指数的比较表明，FMI 对 PEI 的影响比 BMI 更强。此外，获得的 FMI 模型具有更高的准确性。确定高风险个体、需要改善健康相关体能（H-RF）的个体以及 H-RF 风险低的个体，可以有效地规划个体干预服务和培训计划。
