Nascimento Junior, J. R. A. do, J. B. Capelari, and L. F. Vieira. “Impact of Physical Activity on Perceived Stress and Life Satisfaction of Elderly People”. Journal of Physical Education (Maringá), Vol. 23, no. 4, Jan. 2013, pp. 647-54, https://periodicos.uem.br/ojs/index.php/RevEducFis/article/view/16934.