Little information is known concerning the no-self-reported measures of physical activity among African schoolchildren despite alarming prevalence of the cardiometabolic risk factors such as overweight and obesity. This study aims to evaluate some physical and cardiorespiratory profiles among schoolchildren from two government high schools (S1, S2) in Douala, Cameroon. One hundred and seventy-six (176) schoolchildren (114 boys and 62 girls) aged 10-14 years underwent a 9 minutes run test. At the end of the test, distance covered (D), peak and recovery heart rates (Peak HR, HRR) were determined. Prior to testing session, anthropometric data (i.e. height and weight) were taken using a standard protocol and the body max index (BMI) was also calculated. The rating of perceived exertion (RPE) was estimated at the end of the test. Most of schoolchildren (97%) have normal weight. But D (m) was higher compared to some of those observed in Caucasians. D for girls was significantly (p .05) variation was found in BMI, Peak HR and HRR among the schoolchildren. However, significant (p < .05) variation was detected in D for girls in S2 on a reduced track (278m) as compared to that of D for girls in S1 on a larger track (400m). Negative correlation was found between D and RPE (r = -.220, p = .003). These results present some differences on body composition, physical and cardiorespiratory profiles among Cameroonian schoolchildren in accordance with gender and space perception.

中文翻译：

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喀麦隆杜阿拉 10-14 岁城市学童的身体和心肺特征

尽管心脏代谢风险因素（如超重和肥胖）的流行率令人震惊，但关于非洲学童未自我报告的身体活动量度的信息知之甚少。本研究旨在评估喀麦隆杜阿拉两所公立高中（中一、中二）学童的身体和心肺状况。一百七十六 (176) 名 10-14 岁的学童（114 名男孩和 62 名女孩）接受了 9 分钟的跑步测试。在测试结束时，确定覆盖的距离 (D)、峰值和恢复心率 (Peak HR, HRR)。在测试之前，使用标准协议获取人体测量数据（即身高和体重）并计算身体最大指数（BMI）。在测试结束时评估感知用力 (RPE) 的等级。大多数学童 (97%) 体重正常。但是与在白种人中观察到的一些相比，D (m) 更高。女童的 D 显着 (p = .05) 发现学童的 BMI、峰值 HR 和 HRR 存在差异。然而，与在较大轨道（400m）上的 S1 女孩的 D 相比，在缩小轨道（278m）上的 S2 女孩的 D 中检测到显着（p < .05）变化。在 D 和 RPE 之间发现负相关（r = -.220，p = .003）。这些结果表明，喀麦隆学童在身体成分、身体和心肺特征方面存在一些差异，这与性别和空间感知有关。然而，与较大轨道（400m）上的 S1 女孩的 D 相比，在缩小轨道（278m）上的 S2 女孩的 D 检测到显着（p < .05）变化。在 D 和 RPE 之间发现负相关（r = -.220，p = .003）。这些结果表明，喀麦隆学童在身体成分、身体和心肺特征方面存在一些差异，这与性别和空间感知有关。然而，与在较大轨道（400m）上的 S1 女孩的 D 相比，在缩小轨道（278m）上的 S2 女孩的 D 中检测到显着（p < .05）变化。在 D 和 RPE 之间发现负相关（r = -.220，p = .003）。这些结果表明，喀麦隆学童在身体成分、身体和心肺特征方面存在一些差异，这与性别和空间感知有关。