Respiratory Responses during Exercise in Self-contained Breathing Apparatus among Firefighters and Nonfirefighters
Safety and Health at Work
;
: 468-472, 2018.
Artículo
en Inglés
| WPRIM
| ID: wpr-718430
ABSTRACT
BACKGROUND:
Firefighters are required to use self-contained breathing apparatus (SCBA), which impairs ventilatory mechanics. We hypothesized that firefighters have elevated arterial CO₂ when using SCBA.METHODS:
Firefighters and controls performed a maximal exercise test on a cycle ergometer and two graded exercise tests (GXTs) at 25%, 50%, and 70% of their maximal aerobic power, once with a SCBA facemask and once with protective clothing and full SCBA.RESULTS:
Respiratory rate increased more in controls than firefighters. Heart rate increased as a function of oxygen consumption (V.(O₂)) more in controls than firefighters. End-tidal CO₂ (ETCO₂) during the GXTs was not affected by work rate in either group for either condition but was higher in firefighters at all work rates in both GXTs. SCBA increased ETCO₂ in controls but not firefighters.CONCLUSIONS:
The present study showed that when compared to controls, firefighters’ hypoventilate during a maximal test and GXT. The hypoventilation resulted in increased ETCO₂, and presumably increased arterial CO₂, during exertion. It is proposed that firefighters have altered CO₂ sensitivity due to voluntary hypoventilation during training and work. Confirmation of low CO₂ sensitivity and the consequence of this on performance and long-term health remain to be determined.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Consumo de Oxígeno
/
Ropa de Protección
/
Respiración
/
Mecánica
/
Bomberos
/
Prueba de Esfuerzo
/
Frecuencia Respiratoria
/
Frecuencia Cardíaca
/
Hipoventilación
Límite:
Humanos
Idioma:
Inglés
Revista:
Safety and Health at Work
Año:
2018
Tipo del documento:
Artículo
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