Validity and reliability of the Hexoskin® wearable biometric vest during maximal aerobic power testing in elite cyclistsElliot, Catherine A. PhD; Hamlin, Michael J. PhD; Lizamore, Catherine A. PhDThe Journal of Strength & Conditioning Research: July 28, 2017 - Volume Publish Ahead of Print - Issue - p doi: 10.1519/JSC.0000000000002005 Original Research: PDF Only Abstract Author Information The purpose of this study was to investigate the validity and reliability of the Hexoskin® vest for measuring respiration and heart rate (HR) in elite cyclists during a progressive test to exhaustion. Ten male elite cyclists (age 28.8 ± 12.5 yr, height 179.3 ± 6.0 cm, weight 73.2 ± 9.1 kg, V˙ O2max 60.7 ± 7.8 ml.kg.min-1, mean ± SD) conducted a maximal aerobic cycle ergometer test using a ramped protocol (starting at 100W with 25W increments each min to failure) during two separate occasions over a 3-4 day period. Compared to the criterion measure (Metamax 3B) the Hexoskin® vest showed mainly small typical errors (1.3-6.2%) for HR and breathing frequency (f), but larger typical errors (9.5-19.6%) for minute ventilation (V˙E) during the progressive test to exhaustion. The typical error indicating the reliability of the Hexoskin® vest at moderate intensity exercise between tests was small for HR (2.6-2.9%) and f (2.5-3.2%) but slightly larger for V˙E (5.3-7.9%). We conclude that the Hexoskin® vest is sufficiently valid and reliable for measurements of HR and f in elite athletes during high intensity cycling but the calculated V˙E value the Hexoskin® vest produces during such exercise should be used with caution due to the lower validity and reliability of this variable. Department of Tourism, Sport and Society, Lincoln University, New Zealand Corresponding Author Catherine A. Elliot, PhD, PO Box 85084, Lincoln University, Department of Tourism, Sport and Society, Lincoln 7647, New Zealand, firstname.lastname@example.org Phone: +64 (0)3 423 0493 Fax: +64 (0)3 325 3867 Funding disclosure: N/A Copyright © 2018 by the National Strength & Conditioning Association.