Constant power threshold-predicting maximal lactate steady state in recreational cyclists

被引:0
|
作者
Vobejda, Christian [1 ]
Wortmann, Tim [2 ]
Zimmermann, Elke [1 ]
机构
[1] Inst Sports Med, Fac Psychol & Sports Sci, Univ Str 25, D-33615 Bielefeld, Germany
[2] Rehab Hosp Lanserhof, Waakirchen, Germany
关键词
Time trial; Anaerobic threshold; Functional threshold; Cycling; Endurance exercise; RATE DEFLECTION POINT; HEART-RATE-VARIABILITY; VENTILATORY THRESHOLDS; PACING STRATEGY; TIME; EXHAUSTION; INTENSITY; PERFORMANCE; PARAMETERS; VELOCITY;
D O I
10.1007/s12662-022-00801-6
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
Introduction Prolonged time trials proved capable of precisely estimating anaerobic threshold. However, time trial studies in recreational cyclists are missing. The aim of the present study was to evaluate accuracy and viability of constant power threshold, which is the highest power output constantly maintainable over time, for estimating maximal lactate steady state in recreational athletes. Methods A total of 25 recreational athletes participated in the study of whom 22 (11 female, 11 male) conducted all constant load time trials required for determining constant power threshold 30 min and 45 min, which is the highest power output constantly maintainable over 30 min and 45 min, respectively. Maximal lactate steady state was assessed subsequently from blood samples taken every 5 min during the time trials. Results Constant power threshold over 45 min (175.5 +/- 49.6 W) almost matched power output at maximal lactate steady state (176.4 +/- 50.5 W), whereas constant power threshold over 30 min (181.4 +/- 51.4 W) was marginally higher (P = 0.007, d = 0.74). Interrelations between maximal lactate steady state and constant power threshold 30 min and constant power threshold 45 min were very close (R-2 = 0.99, SEE = 8.9 W, Percentage SEE (%SEE) = 5.1%, P < 0.001 and R-2 = 0.99, SEE = 10.0 W, %SEE = 5.7%, P < 0.001, respectively). Conclusions Determination of constant power threshold is a straining but viable and precise alternative for recreational cyclists to estimate power output at maximal lactate steady state and thus maximal sustainable oxidative metabolic rate.
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页码:171 / 179
页数:9
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