补充咖啡因对重复冲刺跑成绩的影响。

Effect of caffeine supplementation on repeated sprint running performance.

作者信息

Carr A, Dawson B, Schneiker K, Goodman C, Lay B

机构信息

School of Sports Science, Exercise and Health, University of Western Australia, Crawley, Australia.

出版信息

J Sports Med Phys Fitness. 2008 Dec;48(4):472-8.

PMID:18997650

Abstract

AIM

This study examined the effects of 6 mgxkg(-1) caffeine ingestion in team-sport players (N.=10) on repeated-sprint running performance (5 sets of 6 x 20 m) and reaction times, 60 min after caffeine or placebo ingestion.

METHODS

Best single sprint and total set sprint times, blood lactate and simple and choice reaction times (RT) were measured.

RESULTS

Total sprint times across sets 1, 3 and 5 (departure every 25 s) were significantly faster after caffeine (85.49+/-5.55 s) than placebo (86.98+/-5.78 s) (P<0.05). Similarly, total sprint times across sets 2 and 4 (departure every 60 s), were significantly faster after caffeine (55.99+/-3.64 s) than placebo (56.77+/-3.74 s) (P<0.05). Significantly higher blood lactates were recorded in caffeine compared to placebo after set 3 (13.1+/-1.2 vs 10.3+/-1.4 mmolxL(-1)) (P<0.05) and set 5 (13.1+/-1.3 vs 10.3+/-1.6 mmolxL(-1)) (P<0.01). There were no significant effects on simple or choice RT, although effect sizes suggested improved post-exercise times after caffeine.

CONCLUSION

Caffeine ingestion 60 min prior to exercise can enhance repeated sprint running performance and is not detrimental to reaction times.

摘要

目的

本研究调查了团队运动运动员（N = 10）摄入6毫克/千克咖啡因后60分钟，对重复冲刺跑成绩（5组，每组6次×20米）和反应时间的影响，同时设置了安慰剂对照组。

方法

测量单次最佳冲刺时间、每组总冲刺时间、血乳酸水平以及简单反应时间和选择反应时间（RT）。

结果

在第1、3和5组（每隔25秒出发一次）中，摄入咖啡因后的总冲刺时间（85.49±5.55秒）显著快于安慰剂组（86.98±5.78秒）（P<0.05）。同样，在第2和4组（每隔60秒出发一次）中，摄入咖啡因后的总冲刺时间（55.99±3.64秒）也显著快于安慰剂组（56.77±3.74秒）（P<0.05）。在第3组（13.1±1.2对10.3±1.4毫摩尔/升）（P<0.05）和第5组（13.1±1.3对10.3±1.6毫摩尔/升）（P<0.01）后，摄入咖啡因组的血乳酸水平显著高于安慰剂组。虽然效应量表明摄入咖啡因后运动后的反应时间有所改善，但对简单反应时间或选择反应时间没有显著影响。