Use Of HrIndex To Predict Oxygen Uptake: A Validation Study: 238 Board #54 May 27 9:30 AM ‐ 11:00 AM. (July 2020) - Kang, Jie; Roser, Christopher; Montemarano, Devyn; Mercado, Hannah; Choma, Morgan; Mendez, Christian; Pollock, Matthew; Ratamess, Nicholas A.; Faigenbaum, Avery D.; Bush, Jill A.