The study of the effect of stress on both combatants physiological and anatomical systems have been poor studied in the specific literature. The present research aimed to study the effect of combat stress in strength manifestations of leg flexor-extensor muscles and the anaerobic metabolism of soldiers. Before and after asymmetrical combat simulation were analyzed parameters of blood lactate concentration, explosive leg strength manifestation and contractile capacity of leg muscle in 186 professional soldiers. Results showed a significant increase (p < 0.05) in blood lactate values (2.23 ± 0.95 vs 7.47 ± 3.67 mmol/L), explosive leg strength (Squat Jump 0.31 ± 0.06 vs 0.35 ± 0.07 m, Countermovement Jump 0.33 ± 0.07 vs 0.36 ± 0.07 m, Abalakov Jump 0.39 ± 0.08 vs 0.41 ± 0.09 m), and a significant decrease of the elastic capacity (0.022 ± 0.04 vs 0.021 ± 0.04) and recruitment and muscle synchronization capability (0.028 ± 0.04 vs 0.026 ± 0.04). This data suggest that combat stress increases the leg strength manifestation despite the significantly increase of muscle acidosis after a combat simulation. This result is probably due to the high activation of the fight-flight system of soldiers which increases the organic response of soldiers and that can compensate the prejudicial effect of acidosis in muscle contraction. These results could be used by officers to improve specific training programs and to improve planning and election of equipment and material for the development of different missions in current theaters of operations.
The present research aimed to analyze the effect of experience and psychophysiological modification by combat stress in soldier's memory in a simulated combat situation. Variables of rate of perceived exertion, blood glucose, blood lactate, lower body muscular strength manifestation, cortical arousal, specific fine motor skills, autonomic modulation, state anxiety, and memory and attention through a postmission questionnaire were analyzed before and after a combat simulation in 15 experienced soldiers of a special operation unit and 20 non-experienced soldiers of light infantry unit from the Spanish Army. The stress of combat simulation produces a significant increase (p < 0.05) in rated perceived exertion, blood glucose, blood lactate, somatic anxiety and a low frequency domain of the heart rate, and a significant decrease of rifle magazine reload time, high frequency domain of the heart rate and somatic anxiety in both groups. The variables of RPE, glucose, CFFT, RMRT, RMSSD, LF/HF, CA, SA and STAI were significantly different in experienced soldiers shown the activation of fight-flight system. The anticipatory anxiety in experienced soldiers shows a cognitive behavioral association by past experiences. The analysis of correct response in the postmission questionnaire show elements more related with the sight and that endanger the physical integrity of soldiers are more remembered, and some significant differences (p < 0.05) in the memory performance of experienced soldiers and non experienced soldiers where experienced soldiers shown a better performance. As conclusion, combat stress produce an increase in the psichophysiological response of soldiers independently of experience, but experienced ones presented a lower negative effect on memory than non experienced. ; La presente investigación tuvo como objetivo analizar el efecto de la experiencia y la modificación psicofisiológica por el estrés de combate en Memoria del soldado en una situación de combate simulada. Variables de la tasa de esfuerzo percibido, glucemia, lactato sanguíneo, menor manifestación de la fuerza muscular del cuerpo, excitación cortical, habilidades motoras finas específicas, modulación autonómica, ansiedad de estado y La memoria y la atención a través de un cuestionario de postmisión se analizaron antes y después de una simulación de combate en 15 Soldados de una unidad de operación especial y 20 soldados no experimentados de la unidad de infantería ligera del ejército español. El estres de La simulación de combate produce un aumento significativo (p <0.05) en el esfuerzo percibido nominal, la glucosa en sangre, el lactato en sangre, la somática ansiedad y un dominio de baja frecuencia de la frecuencia cardíaca, y una disminución significativa del tiempo de recarga del cargador del rifle, alta frecuencia Dominio de la frecuencia cardíaca y ansiedad somática en ambos grupos. Las variables de RPE, glucosa, CFFT, RMRT, RMSSD, LF / HF, CA, SA y STAI fueron significativamente diferentes en soldados experimentados que mostraron la activación del sistema de lucha de vuelo. El anticipatorio La ansiedad en soldados experimentados muestra una asociación cognitiva conductual por experiencias pasadas. El análisis de la respuesta correcta en El cuestionario de envío muestra elementos más relacionados con la vista y que ponen en peligro la integridad física de los soldados. más recordado, y algunas diferencias significativas (p <0.05) en el rendimiento de la memoria de soldados con experiencia y no Soldados experimentados donde los soldados experimentados mostraron un mejor desempeño. Como conclusión, el estrés del combate produce un aumento. en la respuesta psicofisiológica de los soldados independientemente de la experiencia, pero los experimentados presentaron una menor negativa Efecto sobre la memoria que el no experimentado.
