Kantor M A, Fretti S, Gubler C, Kramer M, Pettitt R W
Office of Research & Sponsored Projects, Rocky Mountain University of Health Professions, Provo, UT, 84601, USA.
School of Kinesiology and Physical Therapy, University of Central Florida, Orlando, FL, USA.
Eur J Appl Physiol. 2023 Jan;123(1):43-48. doi: 10.1007/s00421-022-05052-9. Epub 2022 Sep 22.
Graded exercise testing (GXTs) is used to determine maximum oxygen uptake ([Formula: see text]). Recently, customized submaximal exercise testing (CSET) completed on both treadmill and cycle ergometry were validated.
Interrater reliability of the CSET for cycle ergometry was examined. Thirteen participants (age 31 ± 10.2 y, weight 77.9 ± 10.5 kg, height 176.2 ± 9.9 cm, body mass index 25.1 ± 2.9) completed the 2-stage × 3-min CSET protocol performed by two separate testers. True [Formula: see text] was determined using the highest value derived by a GXT and verification bout. Skeletal muscle oxygen saturation ([Formula: see text]), measured using near-infrared spectrometry on the medial gastrocnemius muscle, and [Formula: see text] were monitored during each CSET; whereby, [Formula: see text] kinetics were modeled breath-by-breath data for each 3-min stage. Measurement agreement was quantified using intraclass coefficient (ICC), typical error (TE), and coefficient of variation (CV).
"True" [Formula: see text] (ml·kg·min) between the GXT (41.3 ± 10.5) and verification (42.5 ± 11.5) was established (ICC = 0.98, TE: 0.98, CV 2.1%). Estimated [Formula: see text] by tester 1 (42.5 ± 9.8) and tester 2 (42.7 ± 8.9) did not differ from "true" [Formula: see text] (F = 0.02, p = 0.98, η = 0.00). The second stage evoked a [Formula: see text] slow component of 194 ± 124 ml·min that corresponded with a time-dependent decline of [Formula: see text]. The mean [Formula: see text] from the two CSET testers were highly correlated (ICC = 0.91, TE: 4.1%, CV = 8.9%).
The CSET is a reliable and valid procedure and [Formula: see text] is a useful tool for corroborating the second stage is in the heavy-intensity domain.
分级运动试验（GXT）用于确定最大摄氧量（[公式：见正文]）。最近，在跑步机和自行车测力计上完成的定制亚极量运动试验（CSET）得到了验证。
检查了自行车测力计CSET的评分者间信度。13名参与者（年龄31±10.2岁，体重77.9±10.5kg，身高176.2±9.9cm，体重指数25.1±2.9）完成了由两名不同测试者执行的两阶段×3分钟CSET方案。使用GXT得出的最高值和验证试验确定真实的[公式：见正文]。在每次CSET期间监测使用近红外光谱法在内侧腓肠肌测量的骨骼肌氧饱和度（[公式：见正文]）和[公式：见正文]；由此，[公式：见正文]动力学是对每个3分钟阶段的逐次呼吸数据进行建模。使用组内相关系数（ICC）、典型误差（TE）和变异系数（CV）对测量一致性进行量化。
GXT（41.3±10.5）和验证试验（42.5±11.5）之间的“真实”[公式：见正文]（ml·kg·min）已确定（ICC = 0.98，TE：0.98，CV 2.1%）。测试者1（42.5±9.8）和测试者2（42.7±8.9）估计的[公式：见正文]与“真实”[公式：见正文]无差异（F = 0.02，p = 0.98，η = 0.00）。第二阶段诱发了194±124ml·min的[公式：见正文]慢成分，这与[公式：见正文]随时间的下降相对应。两位CSET测试者的平均[公式：见正文]高度相关（ICC = 0.91，TE：4.1%，CV = 8.9%）。
CSET是一种可靠且有效的程序，[公式：见正文]是用于证实第二阶段处于高强度领域的有用工具。
