标题：Does a Physical Education-based fitness program benefit everyone regardless of the students’ physical fitness profile? A cluster-randomized controlled trial
摘要：The objective of the present study was to compare the effect of a Physical Education-based physical fitness program on physical fitness and physical activity levels among secondary school students with healthy and unhealthy physical fitness profile. One hundred and seven students (final sample 95,48% females;Mage = 12.39 ± 0.75) from five pre-established classes of 7th-8th grade of Secondary Education were cluster-randomly assigned into control group (n = 19) or experimental group (n = 76). Then,according to students’ cardiorespiratory fitness baseline,the experimental group was divided into healthy and unhealthy physical fitness profiles. The experimental group students performed a physical fitness program twice a week for nine weeks. The control group worked a different content during the same time and with the same frequency,but without emphasizing on the physical fitness improvement. Before and after the physical fitness program,students’ physical fitness was objectively measured by the 20-meter shuttle run test. Participants’ physical activity levels were objectively measured through a heart rate monitor (Polar RS300X,Finland) during Physical Education sessions. Results of the one-way analysis of variance showed that both students with healthy and unhealthy physical fitness profiles statistically significantly improved their physical fitness levels after the program (p < 0.01) and had higher statistically significantly physical activity levels during the Physical Education sessions (p < 0.01). Although a Physical Education-based physical fitness program seems to have a similar effect on students with different physical fitness profiles,students with an unhealthy profile obtain more benefits on physical activity levels during the Physical Education sessions.
