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Effects of β‐alanine supplementation on physical performance cognition endocrine function and inflammation during a 24?h simulated military operation

機(jī)譯：補(bǔ)充β-丙氨酸對(duì)24小時(shí)模擬軍事行動(dòng)中的身體表現(xiàn)認(rèn)知內(nèi)分泌功能和炎癥的影響

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Sustained military operations (SUSOPs) are associated with performance decrements and cognitive dysfunction. β‐Alanine (BA) supplementation may have a role in increasing soldier resiliency by enhancing muscle‐buffering capacity and reducing oxidative stress. The purpose of this study was to examine the effects of BA on physical performance, cognition, endocrine function, and inflammation during a 24 h simulated SUSOP. Nineteen males were randomized into one of two groups: BA (n = 10) or placebo (n = 9; PLA) (12 g/day) for 14 days preceding the 24 h SUSOP. Assessments were performed at 0 h (0H), 12 h (12H), and 24 h (24H) during the SUSOP. No changes in visual tracking ability, jump power, or upper‐body muscular endurance were observed between groups or time points (P's > 0.05). Increases in subjective feelings of soreness and fatigue were noted at 12H compared to 0H (P < 0.05) in PLA, but not in BA. Visual reaction time for PLA was slower at 24H compared to 0H (P = 0.035), and PLA made more errors on reaction time testing at 12H compared to BA (P = 0.048), but motor reaction time was faster (P = 0.016) for PLA. Simulated litter carry and 1 km run completion times increased at 24H compared to 0H in both groups (P < 0.05), however, PLA had a longer 1 km time compared to BA at 24H (P = 0.050). Increases in inflammatory and endocrine markers were observed over the style="fixed-case">SUSOP, with no differences between groups. style="fixed-case">BA supplementation appears to maintain some aspects of cognition and physical performance during a 24 h style="fixed-case">SUSOP, with no effects on endocrine function or inflammation.
機(jī)譯：持續(xù)的軍事行動(dòng)（SUSOP）與績(jī)效下降和認(rèn)知功能障礙有關(guān)。補(bǔ)充β-丙氨酸（BA）可能通過增強(qiáng)肌肉緩沖能力和減少氧化應(yīng)激來提高士兵的彈性。這項(xiàng)研究的目的是在24小時(shí)模擬SUSOP中檢查BA對(duì)身體表現(xiàn)，認(rèn)知，內(nèi)分泌功能和炎癥的影響。在24小時(shí)SUSOP之前的14天內(nèi)，將19名男性隨機(jī)分為兩組之一：BA（n = 10）或安慰劑（n = 9; PLA）（12 g /天）。在SUSOP期間的0小時(shí)（0H），12小時(shí)（12H）和24小時(shí)（24H）進(jìn)行評(píng)估。組或時(shí)間點(diǎn)之間未發(fā)現(xiàn)視覺追蹤能力，跳躍力或上身肌肉耐力的變化（P's> 0.05）。在PLA中，在12H時(shí)的主觀酸痛和疲勞感比0H時(shí)有所增加（P <0.05），但在BA中則沒有。 PLA的視覺反應(yīng)時(shí)間在24H時(shí)比0H慢（P = 0.035），PLA在12H時(shí)的反應(yīng)時(shí)間測(cè)試中的誤差比BA更大（P = 0.048），但運(yùn)動(dòng)反應(yīng)時(shí)間更快（P = 0.016）解放軍。兩組的模擬墊料攜帶量和24 km時(shí)的1 km運(yùn)行完成時(shí)間均比0 h增加（P <0.05），但是PLA與24 h時(shí)的BA相比有更長(zhǎng)的1 km時(shí)間（P = 0.050）。在 style =“ fixed-case”> SUSOP 上觀察到炎癥和內(nèi)分泌標(biāo)志物的增加，兩組之間沒有差異。 style =“ fixed-case”> BA 補(bǔ)充似乎可以在24小時(shí) style =“ fixed-case”> SUSOP 期間維持認(rèn)知和身體表現(xiàn)的某些方面，而對(duì)內(nèi)分泌功能或炎癥。

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