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Open AccessArticle

Validation of Cardiorespiratory Fitness Measurements in Adolescents

School of Physical Therapy, Texas Woman’s University, 6700 Fannin, Houston, TX 77030, USA
Department of Kinesiology, Rice University, 6100 Main Street, Houston, TX 77005, USA
Department of Physical Therapy, UT Health San Antonio, 7703 Floyd Curl Dr. San Antonio, TX 78229, USA
Author to whom correspondence should be addressed.
J. Funct. Morphol. Kinesiol. 2019, 4(3), 44;
Received: 28 June 2019 / Revised: 9 July 2019 / Accepted: 11 July 2019 / Published: 13 July 2019
Cardiorespiratory fitness (CRF) is an important indicator of adolescent cardiovascular well-being and future cardiometabolic health but not always feasible to measure. The purpose of this study was to estimate the concurrent validity of the non-exercise test (NET) for adolescents against the Progressive Aerobic Capacity Endurance Run (PACER®) and direct measures of VO2max as well as to examine the concurrent validity of the PACER® with a portable metabolic system (K4b2™). Forty-six adolescents (12–17 years) completed the NET prior to performing the PACER® while wearing the K4b2™. The obtained VO2max values were compared using linear regression, intra-class correlation (ICC), and Bland–Altman plots, and α was set at 0.05. The VO2max acquired directly from the K4b2™ was significantly correlated to the VO2max indirectly estimated from the NET (r = 0.73, p < 0.001, r2 = 0.53, ICC = 0.67). PACER® results were significantly related to the VO2max estimates from the NET (r = 0.81, p < 0.001, r2 = 0.65, ICC = 0.72). Direct measures from the K4b2™ were significantly correlated to the VO2max estimates from the PACER® (r = 0.87, p < 0.001, r2 = 0.75, ICC = 0.93). The NET is a valid measure of CRF in adolescents and can be used when an exercise test is not feasible. View Full-Text
Keywords: VO2max; PACER; non-exercise test VO2max; PACER; non-exercise test
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Migliano, P.; Kabiri, L.S.; Cross, M.; Butcher, A.; Frugé, A.; Brewer, W.; Ortiz, A. Validation of Cardiorespiratory Fitness Measurements in Adolescents. J. Funct. Morphol. Kinesiol. 2019, 4, 44.

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