Heart Rate Analysis Applied to Beginners Electrician Linemen of Energy Distribution Networks Who Ascend and Descend from the PostsErnesto A. Abril, Ernesto M. Abril, Idalia Pacheco, Leonardo M. Abril and Christian P. AbrilMATEC Web Conf., 220 (2018) 09001DOI: https://doi.org/10.1051/matecconf/201822009001