Silva, N. S. L. da, Harris, E. R. A., Ferreira, F. P. M., & Resende, H. G. de. (2020). Free exercise programs for the elderly: a systematic review on adherence and abandonment. Journal of Physical Education , 31(1), e-3149. https://doi.org/10.4025/jphyseduc.v31i1.3149