Heart rate (HR) monitoring during exercise represents a potentially useful strategy for teachers delivering physical education lessons. This study examined how projecting HR monitor data onto a screen acutely affected school students’ exercise intensity during a high-intensity interval training (HIIT) session. Twenty students (12.3 ± 0.9 years, male = 8, female = 12) from one primary school volunteered to participate. Using a randomised crossover design within a 4-week period, participants completed four sessions of HIIT with HR projection and four sessions of HIIT with no ability to view HR. During the HR projection condition all participants viewed their HR on a class screen in real-time, with a changing colour according to HR level. Target intensity was 90% of age-predicted maximum HR. Peak HR and time above 90% HR (RED) were collected in all sessions. Student focus groups and teacher interviews were conducted to gain perceptions around the effects of the projection. Peak HR ( p = 0.005, η2 effect size = 0.049) and RED ( p = 0.000, η2 effect size = 0.083) were significantly greater during the projected condition. Qualitative data indicated that projection improved student motivation to reach the target, and ignited competition amongst peers to work harder. Projecting HR data onto a screen can increase the acute exercise intensity of school students during HIIT. HR projection therefore represents a useful strategy for the delivery of exercise sessions with an emphasis on intensity, within physical education classes.

中文翻译：

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心率监测器投影对在校学生运动努力的急性影响


运动期间的心率 （HR） 监测对于教授体育课的教师来说是一种可能有用的策略。本研究检查了将 HR 监测数据投影到屏幕上如何急性影响在校学生在高强度间歇训练 （HIIT） 期间的运动强度。来自一所小学的 20 名学生 （12.3 ± 0.9 岁，男 = 8，女 = 12） 自愿参加。在 4 周内使用随机交叉设计，参与者完成了 4 次 HIIT 和 4 次 HIIT，无法查看 HR。在 HR 预测条件下，所有参与者都在班级屏幕上实时查看他们的 HR，并根据 HR 级别更改颜色。目标强度为年龄预测最大 HR 的 90%。在所有会话中收集峰值 HR 和高于 90% HR 的时间 （RED）。进行了学生焦点小组和教师访谈，以获得对预测效果的看法。在预测条件下，峰值 HR （ p = 0.005，η2 效应量 = 0.049） 和 RED （ p = 0.000，η2 效应量 = 0.083） 显著升高。定性数据表明，投影提高了学生达到目标的积极性，并激发了同龄人之间的竞争，让他们更加努力地学习。将 HR 数据投影到屏幕上可以增加 HIIT 期间在校学生的急性运动强度。因此，人力资源预测代表了在体育课上提供强调强度的锻炼课程的有用策略。