TY  - JOUR
PY  - 2019//
TI  - Oral glutamine supplement reduces subjective fatigue ratings during repeated bouts of firefighting simulations
JO  - Safety (Basel)
A1  - Moore, Mary
A1  - Moriarty, Terence A.
A1  - Connolly, Gavin
A1  - Mermier, Christine
A1  - Amorim, Fabiano
A1  - Miller, Kevin
A1  - Zuhl, Micah
SP  - e38
EP  - e38
VL  - 5
IS  - 2
N2  - Wildland firefighting requires repetitive (e.g., consecutive work shifts) physical work in dangerous conditions (e.g., heat and pollution). Workers commonly enter these environments in a nonacclimated state, leading to fatigue and heightened injury risk. Strategies to improve tolerance to these stressors are lacking. <br><br>PURPOSE: To determine if glutamine ingestion prior to and after consecutive days of firefighting simulations in the heat attenuates subjective ratings of fatigue, and evaluate if results were supported by glutamine-induced upregulation of biological stress responses. <br><br>METHODS: Participants (5 male, 3 female) ingested glutamine (0.15 g/kg/day) or a placebo before and after two consecutive days (separated by 24 h) of firefighter simulations in a heated chamber (35 °C, 35% humidity). Perceived fatigue and biological stress were measured pre-, post-, and 4 h postexercise in each trial. <br><br>RESULTS: Subjective fatigue was reduced pre-exercise on Day 2 in the glutamine group (p < 0.05). Peripheral mononuclear cell expression of heat shock protein 70 (HSP70) and serum antioxidants were elevated at 4 h postexercise on Day 1 in the glutamine trial (p < 0.05). <br><br>CONCLUSIONS: Ingestion of glutamine before and after repeated firefighter simulations in the heat resulted in reduced subjective fatigue on Day 2, which may be a result of the upregulation of biological stress systems (antioxidants, HSPs). This response may support recovery and improve work performance.<p />  <p>Language: en</p>
LA  - en
SN  - 2313-576X
UR  - http://dx.doi.org/10.3390/safety5020038
ID  - ref1
ER  -