Present research studied the psychophysiological response and shooting performance taking into consideration the experience of the soldier after a physical stress protocol, which leaded to acute fatigue conditions. Sixty soldiers were divided into experienced and non-experienced groups to conduct a high-intensity interval training (HIIT) based on endurance type exercises (10 intervals of 40 m run at maximum intensity with 2 changes of direction and 45 s of recovery. Psychophysiological and shooting performance variables were measured before, during and after the HIIT protocol. Significant increases in heart rate, blood lactate, lower limbs strength, as well as a significant decrease in blood oxygen saturation and body temperature were found in both groups. Shooting performance was affected by experience and fatigue, being more accentuated in non-experienced. Present HIIT protocol elicited a similar psychophysiological response than in previously reported combat manoeuvres, thus proving to be an optimal stimuli approach/intervention for soldier's specific physical preparation

目前的研究研究了心理生理反应和射击表现，同时考虑了士兵在身体压力协议后的体验，这导致了急性疲劳状况。60名士兵分为经验组和非经验组，进行基于耐力型练习的高强度间歇训练（HIIT）（10次最大强度跑40米，2次换方向，45秒恢复）。在HIIT方案之前、期间和之后测量了射击性能变量，发现两组的心率、血乳酸、下肢力量显着增加，以及血氧饱和度和体温显着降低。射击性能受到影响由于经验和疲劳，在没有经验的情况下更加突出。目前的 HIIT 协议引发了与先前报道的战斗演习相似的心理生理反应，从而证明是士兵特定身体准备的最佳刺激方法/干预