游泳中风率的调控：对摄氧动力学的影响

Manipulation of Stroke Rate in Swimming: Effects on Oxygen Uptake Kinetics.

作者信息

Franken Marcos, Figueiredo Pedro, De Assis Correia Ricardo, Feitosa Wellington Gomes, Lazzari Caetano Decian, Diefenthaeler Fernando, Castro Flávio Souza

机构信息

Aquatic Sports Research Group, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.

Department of Health Sciences, Universidade Regional Integrada do Alto Uruguai e das Missões, Santiago, Brazil.

出版信息

Int J Sports Med. 2023 Jan;44(1):56-63. doi: 10.1055/a-1930-5462. Epub 2022 Aug 24.

DOI:10.1055/a-1930-5462

PMID:36002028

Abstract

The study aimed to assess the effect of different front crawl stroke rates (SRs) in the oxygen uptake (̇VO) kinetics and ̇VO peak, the total time to exhaustion (TTE), and blood lactate concentration ([La]) at 95% of the 400-m front crawl test (T400) mean speed (S400). Twelve endurance swimmers performed a T400 and four trials at 95% of the S400: (i) free SR, (ii) fixed SR (100% of the average free SR trial), (iii) reduced SR (90% of the average free SR trial), and (iv) increased SR (110% of the average free SR trial). ̇VO was accessed continuously with breath-by-breath analysis. The results highlighted: (i) the time constant at increased SR (13.3±4.2 s) was lower than in the reduced SR condition (19.5±2.6 s); (ii) the amplitude of the primary phase of ̇VO kinetics in the fixed SR (44.0±5.8 ml·kg·min) was higher than in the increased SR condition (39.5±6.4 ml·kg·min); and (iii) TTE was lower in the fixed SR (396.1±189.7 s) than the increased SR condition (743.0±340.0 s). The results indicate that controlled SR could be considered a swimming training strategy, focusing on physiological parameters overload.

摘要

本研究旨在评估不同自由泳划频（SR）对摄氧量（̇VO）动力学、̇VO峰值、400米自由泳测试（T400）平均速度（S400）的95%时的总力竭时间（TTE）以及血乳酸浓度（[La]）的影响。12名耐力游泳运动员进行了一次T400测试，并在S400的95%速度下进行了四项试验：（i）自由划频，（ii）固定划频（自由划频试验平均值的100%），（iii）降低划频（自由划频试验平均值的90%），以及（iv）增加划频（自由划频试验平均值的110%）。通过逐次呼吸分析连续监测̇VO。结果表明：（i）增加划频时的时间常数（13.3±4.2秒）低于降低划频时的时间常数（19.5±2.6秒）；（ii）固定划频时̇VO动力学初级阶段的幅度（44.0±5.8毫升·千克·分钟）高于增加划频时的幅度（39.5±6.4毫升·千克·分钟）；（iii）固定划频时的TTE（396.1±189.7秒）低于增加划频时的TTE（743.0±340.0秒）。结果表明，可将控制划频视为一种游泳训练策略，重点在于生理参数的超负荷。