Objetivo: verificar o efeito do esfor?o f?sico sobre as fun??es cognitivas de
trabalhadores eletricistas utilizando equipamento de prote??o individual
(EPI). M?todos: participaram 28 eletricistas que trabalhavam na constru??o,
manuten??o e opera??o de redes de distribui??o de energia. Todos do sexo
masculino, sadios e aptos para a pr?tica de exerc?cios f?sicos. As fun??es cognitivas foram representadas pelo teste de rea??o simples (TRS) e pelo n?vel
de vigil?ncia mental (NVM). O TRS e o NVM foram mensurados pr? e p?s-
-teste m?ximo progressivo, em esteira rolante, a 27 ?C de temperatura seca e
umidade relativa do ar de 64%. O teste consistiu em aumentos progressivos
na velocidade e na inclina??o da esteira at? a fadiga, com utiliza??o de EPI.
Resultados: a m?dia (desvio padr?o) do TRS n?o foi significativamente diferente antes, 227,8 (35,1) ms, e ap?s o exerc?cio, 220,6 (24,6) ms. O NVM foi
significativamente maior ap?s o exerc?cio em todas as situa??es: frequ?ncia
crescente ? 36,5 (5,1) Hz vs 39,5 (2,7) Hz, frequ?ncia decrescente ? 36,0 (5,2)
vs 39,0 (3,88) Hz, e frequ?ncia geral ? 36,2 (4,9) vs 39,2 (3,1) Hz. Conclus?o:
o exerc?cio progressivo m?ximo realizado com EPI n?o modificou o tempo de
rea??o simples e aumentou o n?vel de vigil?ncia mental de eletricistas.Objective: to verify the effects of physical effort on the cognitive functions
of electricians wearing personal protective equipment (PPE). Methods:
28 electricians participated. They worked on the construction, maintenance
and operation of electrical power distribution networks. All were male, healthy
and able to practice physical exercises. The cognitive functions were checked by
measuring simple reaction time (SRT) and mental alertness level (MAL). SRT
and MAL were measured before and after progressive maximal exercise, on a
treadmill, at 27 ?C dry temperature and 64% relative humidity, wearing PPE.
The test consisted of progressive increases in treadmill speed and incline, until
fatigue. Results: SRT mean difference was not significantly different before ?
227.8 (35.1) ms ? and after exercising ?220.6 (24.6) ms. MAL was significantly
higher after exercise in all situations: increasing frequency - 36.5 (5.1) Hz vs.
39.5 (2.7) Hz; decreasing frequency-36.0 (5.2) Hz vs. 39.0 (3.88) Hz; and general
frequency 36.2 (4.9) Hz vs. 39.2 (3.1) Hz. Conclusion: progressive maximal
exercise performed while wearing PPE caused no change in simple reaction
time, and increased electricians? mental alertness level
