BLOOD LACTATE AND METABOLIC RESPONSES TO CONTROLLED FREQUENCY BREATHING DURING GRADED SWIMMING
BLOOD LACTATE AND METABOLIC RESPONSES TO CONTROLLED FREQUENCY BREATHING DURING GRADED SWIMMING
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分级游泳期间控制频率呼吸的血乳酸和代谢反应
DOI：
10.1519/r-14543.1
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发表时间：
2005
影响因子：
3.2
通讯作者：
Margaret E. Ciccolella
中科院分区：
文献类型：
--
作者：
Sharon A. West;M. Drummond;J. Vanness;Margaret E. Ciccolella
控制频率呼吸（CFB）是游泳运动员使用的一种训练技术，旨在通过限制身体的氧气供应并刺激无氧代谢来模拟高强度的工作量。在 CFB 期间，游泳者会自愿限制呼吸，从理论上讲，这会限制氧气的供应并刺激无氧代谢。本研究的目的是确定游泳强度分级增加过程中 CFB 对血乳酸和代谢反应的影响。自由游泳 (FS) 方案用于确定血乳酸和心率 (HR) 对 CFB 的反应，而系绳游泳 (TS) 方案用于确定血乳酸、HR 和对 CFB 的通气反应。在这两种方案中，受试者以峰值强度的 55%、65%、75% 和 85% 的工作量进行了四次 3 分钟的游泳试验。共有 46 名大学游泳运动员参与了这项研究。 34 名受试者（14 名男性和 20 名女性）完成了 FS 方案，12 名受试者（7 名男性和 5 名女性）完成了 TS 方案。与正常呼吸相比，CFB 在 TS 方案期间减少了通气量和 VO2 (p < 0.05)，在 FS 方案期间减少了 HR (p < 0.05)。然而，CFB 并未改变任一方案的血乳酸浓度（p > 0.05）。我们的研究结果表明，虽然 CFB 不会改变血乳酸对游泳强度分级增加的反应，但它似乎会降低对运动的通气和心率反应。因此，游泳教练可以使用中等强度的 CFB 来模拟高强度训练，但应考虑调整心率训练区以反映与通气减少相关的心率降低。
Controlled frequency breathing (CFB) is a training technique used by swimmers in an effort to simulate high-intensity workloads by limiting oxygen availability to the body and stimulating anaerobic metabolism. During CFB, a swimmer voluntarily restricts breathing, which, theoretically, limits oxygen availability and stimulates anaerobic metabolism. The purpose of this study was to determine the influence of CFB on blood lactate and metabolic responses during graded increases in swimming intensity. A free swimming (FS) protocol was used to determine blood lactate and heart rate (HR) responses to CFB, while a tethered swimming (TS) protocol was used to determine blood lactate, HR, and ventilatory responses to CFB. The subjects swam four 3-minute trials at workloads of 55, 65, 75, and 85% of peak intensity during both protocols. A total of 46 competitive collegiate swimmers participated in the study. Thirty-four subjects (14 men and 20 women) completed the FS protocol, and 12 subjects (7 men and 5 women) completed the TS protocol. CFB reduced ventilation and VO2 (p < 0.05) during the TS protocol and reduced HR (p < 0.05) during the FS protocol when compared to normal breathing. However, CFB did not alter blood lactate concentrations for either protocol (p > 0.05). Our findings demonstrate that although CFB does not alter the blood lactate response to graded increases in swimming intensity, it appears to reduce the ventilatory and HR responses to exercise. Thus, swim coaches can use CFB at moderate intensities to simulate high-intensity training but should consider adjusting HR training zones to reflect the reduction in HR associated with reduced ventilation.