[en] Purpose: determine the physical activity levels (PAL) in physical education (PE) and identify and assess the factors associated to it among a sample of high school students (HSS). Methodology: participated in the study 286 students (53.5% girls, age = 13.7 ± 1.2) of the Galician Autonomous Community. The PAL were measured with accelerometers and heart rate monitors in four sessions (fitness, team sports, gymnastic skills and free play). Data related to the anthropometric profile (bioimpedance), cardiorespiratory fitness (course navette), musculoskeletal and motor fitness (handgrip strength, standing broad jump, sit and reach and 10x5 m shuttle run test), motor skills (soccer and basketdribbling test, balance assessment), motivational factors (2x2 achievement goals, perceived competence and perceived enjoyment) and daily PAL (PAQ-A). A preliminary descriptive analysis of the variables and inferential analysis by nonparametric ANOVA (nparLD), Wilcoxon, Mann-Whitney and Spearman Rho was made. Results: the lesson content and the sex, individually and jointly, have a significant effect (p <0.001) on the values of motor engagement (MoE) and physiological engagement (PoE) (p <0.05), not observing this effect for age. The anthropometric profile and to a lesser extent cardiorespiratory fitness (CRF) have a significant effect (p <0.01), mainly on the values of MoE. Significant associations are observed between handgrip strength, standing broad jump and basket-dribbling test according to the variables of MoE, while the approach performance (2x2), perceived competence and daily PAL variables, exclusively offer a significant association with the variables of PoE. The observed associations are more common in men than in women and depend on the lesson content. PoE values exceed those suggested in the Healthy People 2010 (p <0.01), while the MoE remain below this (p <0.01). Conclusion: the lesson content, the sex, the anthropometric profile and CRF have an effect on the PAL in PE. Age has no such effect and, in the remaining variables, the associations found depend on the type of the analyzed variabgle, the sex and the lesson content.

[gl] Obxectivos: determinar os niveis de actividade física (NAF) en educación física (EF) e identificar e valorar os factores asociados ao mesmo nunha mostra de estudantes de ensino secundario (ESO). Metodoloxía: participaron no estudo 286 estudantes de ESO (53,5% mulleres, idade = 13,7 ± 1,2 anos) da comunidade autónoma galega. Os NAF medíronse con acelerómetros e cardiofrecuenciometros durante catro sesións (condición física, deportes colectivos, habilidades ximnásticas e xogo libre). Recolléronse datos relacionados co perfil antropométrico (bioimpedancia), aptitude cardiorrespiratoria (course navette), aptitude músculo esquelética e motriz (dinamometría manual, salto horizontal, sit and reach e carreira de ida/volta de 10 x 5 m), aptitude perceptivo-motriz (bote e conducción de balón en zig-zag e valoración do equilibrio), factores motivacionais (metas de logro 2x2, competencia percibida e desfrute percibido) e NAF habitual (cuestionario PAQ-A). Fíxose unha análise descriptiva previa das variables e una análise inferencial a través de ANOVA non paramétrica (nparLD), Wilcoxon, Mann-Whitney e Rho de Spearman. Resultados: o tipo de sesión e o sexo, individual e conxuntamente, teñen efecto significativo (p < 0,01) sobre os valores de compromiso motor (CoM) e compromiso fisiolóxico (CoF) (p < 0,05), non atopando tal efecto no caso da idade. O perfil antropométrico, e en menor medida a aptitude cardiorrespiratoria (ACR), amosan efecto significativo (p < 0,01), fundamentalmente sobre os valores de CoM. Aparecen asociacións significativas entre as probas de dinamometría manual, salto horizontal e bote de balón con respecto as variables de CoM, mentres que as variables de aproximación rendemento, competencia percibida e nivel de AF habitual amosan asociación significativa exclusivamente coas variables de CoF. As asociacións observadas son máis frecuentes nos homes que nas mulleres e dependen do tipo de sesión. Os valores de CoF superan os suxeridos no Healthy People 2010 (p < 0,01), mentres que os de CoM quedan por debaixo do mesmo (p < 0,01). Conclusión: o tipo de sesión, o sexo, o perfil antropométrico e a ACR teñen efecto sobre os NAF en EF. A idade non amosa tal efecto e nas variables restantes as asociacións dependen do tipo de variable analizada, o sexo e o tipo de sesión.