Abstract：
Time constraints comprise one limiting factor for implementing school-based physical activity programs. The aim of this pilot cluster randomized controlled study was to explore the effects of a cycle ergometer intervention during regular lessons on physical fitness, body composition, and health-related blood parameters.
Participants attended one of 2 classes selected from one school, which were randomly assigned to an intervention group (n = 23, 11.2 [0.5] y) consisting of cycling on classroom-based ergometers during 3 lessons per week at a self-selected intensity and a control group (n = 21, 11.3 [0.5] y) not receiving any treatment. Prior to and after the 5-month intervention period, physical fitness (with ventilatory threshold as primary outcome), body composition, and parameters of glucose and lipid metabolism were assessed.
A significant time × group interaction was revealed for ventilatory threshold (P = .035), respiratory compensation point (P = .038), gross efficiency (P < .001), maximal aerobic power (P = .024), triglycerides (P = .041), and blood glucose levels (P = .041) with benefits for the intervention group. Peak oxygen uptake and body composition were not affected.
Children\'s aerobic capacity benefited from the low-intensity school-based cycling intervention, while body composition and most blood parameters were not affected. The intervention using cycle ergometers is a feasible and time-saving strategy to elevate submaximal physical fitness.
Participants attended one of 2 classes selected from one school, which were randomly assigned to an intervention group (n = 23, 11.2 [0.5] y) consisting of cycling on classroom-based ergometers during 3 lessons per week at a self-selected intensity and a control group (n = 21, 11.3 [0.5] y) not receiving any treatment. Prior to and after the 5-month intervention period, physical fitness (with ventilatory threshold as primary outcome), body composition, and parameters of glucose and lipid metabolism were assessed.
A significant time × group interaction was revealed for ventilatory threshold (P = .035), respiratory compensation point (P = .038), gross efficiency (P < .001), maximal aerobic power (P = .024), triglycerides (P = .041), and blood glucose levels (P = .041) with benefits for the intervention group. Peak oxygen uptake and body composition were not affected.
Children\'s aerobic capacity benefited from the low-intensity school-based cycling intervention, while body composition and most blood parameters were not affected. The intervention using cycle ergometers is a feasible and time-saving strategy to elevate submaximal physical fitness.
摘要：
时间限制包括实施基于学校的体育活动计划的一个限制因素。这项初步的集群随机对照研究的目的是探索在常规课程中进行周期测力计干预对身体健康的影响，身体成分,和健康相关的血液参数。
参与者参加了从一所学校选出的两个班级之一，将其随机分配到一个干预组(n=23,11.2[0.5]y),其中包括每周3节课以自行选择的强度骑自行车和一个对照组(n=21,11.3[0.5]y),不接受任何治疗.在5个月干预期之前和之后，身体素质（以通气阈值为主要结果），身体成分,并对糖脂代谢参数进行了评估。
显示通气阈值的显着时间×组相互作用（P=.035），呼吸补偿点（P=.038），总效率（P<.001），最大有氧能力（P=.024），甘油三酯（P=.041），和血糖水平（P=0.041）对干预组有益。峰值摄氧量和身体成分不受影响。
儿童的有氧能力得益于低强度学校自行车干预，而身体成分和大多数血液参数不受影响。使用自行车测力计进行干预是一种可行且节省时间的策略，可以提高亚最大的身体素质。
参与者参加了从一所学校选出的两个班级之一，将其随机分配到一个干预组(n=23,11.2[0.5]y),其中包括每周3节课以自行选择的强度骑自行车和一个对照组(n=21,11.3[0.5]y),不接受任何治疗.在5个月干预期之前和之后，身体素质（以通气阈值为主要结果），身体成分,并对糖脂代谢参数进行了评估。
显示通气阈值的显着时间×组相互作用（P=.035），呼吸补偿点（P=.038），总效率（P<.001），最大有氧能力（P=.024），甘油三酯（P=.041），和血糖水平（P=0.041）对干预组有益。峰值摄氧量和身体成分不受影响。
儿童的有氧能力得益于低强度学校自行车干预，而身体成分和大多数血液参数不受影响。使用自行车测力计进行干预是一种可行且节省时间的策略，可以提高亚最大的身体素质。
