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. 2022 May 27;11(6):823. doi: 10.3390/biology11060823

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(A) BIVA confidence between adult Serie A football players (Group 9, green vector), Bologna (Group 10, blue vector) and Russi (Group 11, red vector) adolescent players. (B) BIVA tolerance between adult Serie A football players (Micheli vector, [31]) and Bologna U15 (Group 1), Russi U15 (Group 2), Bologna U14 (Group 3), Russi U14 (Group 4), Bologna U13 (Group 5), Russi U13 (Group 6), Bologna U12 (Group 7), and Russi U12 (Group 8). Note: T, Hotelling T²; F, Snedecor-Fisher test; p, p-value; D, Mahalanobis distance; *, statistically significant.