补充碳酸氢盐对青年男性间歇冲刺运动的影响

Supplement of Bicarbonate Improved Interval Sprint Exercise Capacity in Young Males

对36名青年男性篮球运动员分别口服HCO_3^-和安慰剂(两次实验间隔1周)后60min进行一次高强度间歇冲刺实验(5×10s,60s间歇),记录训练时的平均功率(APO)和峰值功率(PPO).分别于摄入前、训练前、训练后即刻以及训练后5min取动脉血检测酸碱平衡稳态;于训练前、训练后即刻、训练后60min和120min取静脉血检测血浆氧化应激水平.结果显示:补充HCO_3^-时高强度冲刺实验中的APO高于补充安慰剂(P<0.05);训练前、训练后即刻和训练后5 min,补充HCO_3^-时[pH]、[HCO_3^-]高于补充安慰剂(P<0.05),而[H^+]则低于补充安慰剂(P<0.05);与训练前比较,补充安慰剂时各时间点训练后血浆MDA升高,补充HCO_3^-时各氧化应激参数均无显著性变化(P>0.05).训练前补充HCO_3^-,可以通过维持酸碱平衡稳态提高青年男性间歇冲刺运动能力,但并不能抑制运动诱导的氧化应激.

Thirty-six male basketball athletes performed oral HCO_3^- and placebo tests respectively（with one week interval between tests）followed by an high-intensity interval sprint trial（5×10 swith 60 srecovery）after 60 min,and average power output（APO）as well as peak power output（PPO）were recorded.Before ingestion and training,immediately after training and 5 min after training,acid-base equilibrium indexes were determined in arterial blood samples.Before ingestion,training,immediately after training,60 and 120 min after training,plasma oxidative stress indicators were measured in venous blood.The results displayed：APO increased by supplement of HCO_3^- during high-intensity interval sprint trial compared with placebo（P〈0.05）;[pH]and[HCO_3^-]raised while[H~＋]reduced before,immediately and 5 min after training by supplement of HCO_3^- compared with placebo（P〈0.05）;compared with before training,plasma MDA heightened（P〈0.05）in all time points after training by oral placebo,although no significant change of all oxidative stress indexes by HCO_3^- ingestion（P〉0.05）.The findings indicated that supplement of HCO_3^- before training improved exercise capacity following high-intensity interval sprint training in young males possibly through maintainance of acid-base equilibrium but unlikely to be due to a decreased oxidative stress.