HINO, A. A. F.; RODRIGUEZ-AÑEZ, C. R.; REIS, R. S. <b>Validation of “SOFIT” to evaluate physical activity during physical education classes in high school students</b&gt; - doi: 10.4025/reveducfis.v21i2.7739. Journal of Physical Education , v. 21, n. 2, p. 271-278, 17 Jun. 2010.