篮球运动训练后恢复方法对血乳酸浓度恢复的影响

Influence of recovery mode on concentration of blood lactic acid during intervals in basketball games

目的:分析激烈的篮球比赛后间歇期间的不同休息方式对消除血乳酸的影响。方法:于2004-02/06选择广东蓝球队男子运动员5名为研究对象,年龄(20±2)岁,身高(187.7±2.8)cm,体质量(80.5±4.4)kg,最大摄氧量(50.2±5.0)mL/(kg·min)。受试者在比赛间歇中的休息方式分安静和活动两种。第一场比赛的两次休息期间均吸正常空气、自然恢复。第二场比赛的两次休息期间吸体积分数为0.7的氧气和体积分数为0.3的氮气混合气,吸氧时间为3min。第一场和第二场比赛的间隔时间为2d。进行功率自行车递增负荷运动实验。采用2900型气体代谢分析仪测定最大摄氧量,采用ISY-1500型全血乳酸分析仪测定血乳酸浓度。采用心率测定仪测定运动中最大心率和恢复期间的心率。结果:纳入受试者5名,均进入结果分析。①在间歇期间吸正常空气的心率变化与吸高浓度氧的变化差异无显著性[安静方式休息分别为(119±3),(118±1)次/min;活动方式休息分别为(134±2),(131±4)次/min,P>0.05]。②在间歇期间吸正常空气时,活动方式休息的血乳酸浓度比安静方式休息明显减少[分别为(3.99±0.97),(4.35±0.45)mmol/L,P<0.05]。无论是安静或活动方式休息,在间歇期间吸高浓度氧后比吸氧前明显减少,差异显著[安静方式休息分别为(3.22±0.66),(4.59±0.96)mmol/L,活动方式休息分别为(2.92±0.81),(4.95±1.53)mmol/L,P<0.05]。结论:活动方式休息与吸高浓度氧相结合可使血乳酸浓度显著减少。

AIM： To analyze the effects of different resting modes on the concentrations of blood lactic acid during intervals in the intense basketball games. METHODS： Five male basketball players volunteered as the subjects [Age （20±2） years, Height （187.7±2.8） cm, Weight （80.5±4.4） kg, VO2max （50.2±5.0） mL/kg per minute] were selected from Guangdong basketball team for the research between February and June in 2004. They had two resting modes during intervals in the intense basketball games： rest mode and active mode. Two resting periods in the first match were both inhaled normal air and recovery normally. The inhalation of the two resting period in the second match was gas mixed by 70% O2 and 30% N2 for 30 minutes. The interval between the first and the second match was 2 days. VO2max was obtained during an incremental exercise test to exhaustion on a cycle ergometer and determined by 2900 gas metabolism analyzer, while the blood lactic acid concentration was analyzed by ISY-1500 whole blood lactic acid instrument. Maximal heart rate （HRmax and HR in the recovery stage were determined by HR detector. RESULTS： Five subjects were all involved in the result analysis.（1）HR had no significant difference between group inhaling normal air and group inhaling 70% O2 during intervals at rest [rest mode： （119±3）, （118±1） beats per minute; active mode： （134±2）, （131±4） beats per minute, P 〉 0.05].（2）During intervals, the lactic acid concentrations in the normal air grouo were significantly decreased under active mode, compared with rest mode [（3.99±0.97）, （4.35 ±0.45） mmol/L, P 〈 0.05]. No matter under active or rest mode, lactic acid concentrations during rest were significantly lower after inhaling 70% O2 than that before inhaling 70% O2 [rest mode： （3.22±0.66）, （4.59±0.96） mmol/L; active mode： （2.92±0.81）, （4.95±1.53） mmol/L, P 〈 0.05]. CONCLUSION： The combination of active resting mode and inhaling high concentrated O2 can significantly decrease the blood lactic acid concentrations.