咖啡因可提高最大无氧功率和血乳酸浓度。
Caffeine increases maximal anaerobic power and blood lactate concentration.
作者信息
Anselme F, Collomp K, Mercier B, Ahmaïdi S, Prefaut C
机构信息
Service d'exploration de la fonction respiratoire, Hôpital Aiguelongue, Montpellier, France.
出版信息
Eur J Appl Physiol Occup Physiol. 1992;65(2):188-91. doi: 10.1007/BF00705079.
The aim of this study was to specify the effects of caffeine on maximal anaerobic power (Wmax). A group of 14 subjects ingested caffeine (250 mg) or placebo in random double-blind order. The Wmax was determined using a force-velocity exercise test. In addition, we measured blood lactate concentration for each load at the end of pedalling and after 5 min of recovery. We observed that caffeine increased Wmax [964 (SEM 65.77) W with caffeine vs 903.7 (SEM 52.62) W with placebo; P less than 0.02] and blood lactate concentration both at the end of pedalling [8.36 (SEM 0.95) mmol.l-1 with caffeine vs 7.17 (SEM 0.53) mmol.l-1 with placebo; P less than 0.01] and after 5 min of recovery [10.23 (SEM 0.97) mmol.l-1 with caffeine vs 8.35 (SEM 0.66) mmol.l-1 with placebo; P less than 0.04]. The quotient lactate concentration/power (mmol.l-1.W-1) also increased with caffeine at the end of pedalling [7.6.10(-3) (SEM 3.82.10(-5)) vs 6.85.10(-3) (SEM 3.01.10(-5)); P less than 0.01] and after 5 min of recovery [9.82.10(-3) (SEM 4.28.10(-5)) vs 8.84.10(-3) (SEM 3.58.10(-5)); P less than 0.02]. We concluded that caffeine increased both Wmax and blood lactate concentration.
本研究的目的是明确咖啡因对最大无氧功率（Wmax）的影响。14名受试者按随机双盲顺序摄入咖啡因（250毫克）或安慰剂。使用力-速度运动测试来测定Wmax。此外，我们在蹬踏结束时和恢复5分钟后测量了每个负荷下的血乳酸浓度。我们观察到，咖啡因使Wmax增加[摄入咖啡因时为964（标准误65.77）瓦，而摄入安慰剂时为903.7（标准误52.62）瓦；P<0.02]，并且在蹬踏结束时[摄入咖啡因时为8.36（标准误0.95）毫摩尔·升-1，而摄入安慰剂时为7.17（标准误0.53）毫摩尔·升-1；P<0.01]以及恢复5分钟后[摄入咖啡因时为10.23（标准误0.97）毫摩尔·升-1，而摄入安慰剂时为8.35（标准误0.66）毫摩尔·升-1；P<0.04]的血乳酸浓度也增加。蹬踏结束时，乳酸浓度/功率商（毫摩尔·升-1·瓦-1）在摄入咖啡因时也增加[7.6×10-3（标准误3.82×10-5）对6.85×10-3（标准误3.01×10-5）；P<0.01]，恢复5分钟后也是如此[9.82×10-3（标准误4.28×10-5）对8.84×10-3（标准误3.58×10-5）；P<0.02]。我们得出结论，咖啡因增加了Wmax和血乳酸浓度。
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