Longitudinal Training-related Hematological Changes in Boys and Girls from Ages 12 to 15 yr

Purpose Natural growth and maturation cause hemoglobin mass (Hbmass) and blood volume (BV) to increase during childhood and adolescence. Whether endurance training during the same period can cause further increases in these variables is not clear. Also, body composition develops differently in girls and boys during puberty, and the effect of these differences on hematological variables has not been previously studied. Methods Forty-two endurance athletes (End group; 24 boys) and 34 athletes from other sports (non-End group; 23 boys) were tested at ages 12, 13, and 15 yr for Hbmass, BV, plasma volume (PV), red cell volume (RCV), hematological variables, and anthropometrics. Results At age 12 yr, Hbmass and BV showed no difference between sexes and training groups in absolute values or relative to fat-free mass (FFM). Relative to FFM, Hbmass and BV averaged 11.7 (0.8) g·kg−1 and 95 (6.8) mL·kg−1. Increases in FFM from ages 12 to 15 yr primarily determined the increased Hbmass and BV for both sexes with no differences between training groups. At age 15 yr, Hbmass relative to FFM was higher in boys than girls, 13.1 (0.8) g·kg−1 and 12.1 (0.9) g·kg−1 (P
Source: Medicine and Science in Sports and Exercise - Category: Sports Medicine Tags: APPLIED SCIENCES Source Type: research

Related Links:

Publication date: Available online 28 September 2020Source: Journal of the American College of RadiologyAuthor(s): Christina Cinelli, David Somsen, Ashley Quinn, Rebecca Murray, Nancy Horn
Source: Journal of the American College of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): U. Hueck, H. Muggenthaler, M. Hubig, A. Heinrich, F. Güttler, R. Wagner, G. Mall, U. Teichgräber
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Hong Wei, Hanyu Jiang, Xijiao Liu, Yun Qin, Tianying Zheng, Siyun Liu, Xin Zhang, Bin Song
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Louise CD Konijn, Richard AP Takx, Pim A de Jong, Marlon I Spreen, Hugo TC Veger, Willem PThM Mali, Hendrik van Overhagen
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Naik Vietti Violi, Pamela Argiriadi, Ally Rosen, Mathew Cherny, Amanda Weiss, Gabriela Hernandez-Meza, James S. Babb, Shingo Kihira, Sara Lewis, Bachir Taouli
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Catherine King, Ronnie Sebro
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): P.D. Stelzer, O. Steding, M.W. Raudner, G. Euller, P. Clauser, P.A.T. Baltzer
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Michelle I. Higgins, Dylan J. Martini, Dattatraya H. Patil, Sean Steele, Sean Evans, Benjamin P. Petrinec, Sarah P. Psutka, Aarti Sekhar, Mehmet Asim Bilen, Viraj A. Master
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Regine Mariette Perl, Felix Gronbach, Jan Fritz, Marius Stefan Horger, Tobias Hepp
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 28 September 2020Source: European Journal of RadiologyAuthor(s): Darryl B. Sneag, Steve P. Daniels, Christian Geannette, Sophie C. Queler, Bin Q. Lin, Chinthaka de Silva, Ek Tsoon Tan
Source: European Journal of Radiology - Category: Radiology Source Type: research
More News: Boys | Girls | Hematology | Science | Sports Medicine | Training | Universities & Medical Training