Your browser doesn't support javascript.
loading
Effects of the Birthplace Altitude and Training Volume on Hematological Characteristics in Youth and Junior Male Colombian Cyclists.
Mancera-Soto, Erica; Garzon, Mauricio; Comtois, Alain S; Millet, Grégoire P.
Afiliação
  • Mancera-Soto E; Departamento del Movimiento Corporal Humano, Facultad de Medicina, Universidad Nacional de Colombia, Bogotá, Colombia.
  • Garzon M; Department of Physical Activity Sciences, University of Quebec in Montreal, Montreal, QC, Canada.
  • Comtois AS; Department of Physical Activity Sciences, University of Quebec in Montreal, Montreal, QC, Canada.
  • Millet GP; Institute of Sport Sciences, University of Lausanne, Lausanne, Switzerland.
Int J Sports Physiol Perform ; : 1-6, 2024 Sep 24.
Article em En | MEDLINE | ID: mdl-39322215
ABSTRACT

PURPOSE:

The long-term development of talent in endurance sports is a topic of interest. Among various factors, the importance of total hemoglobin mass (tHbmass) and the potential benefits of being an altitude-native athlete remain unclear, particularly in young categories. This study aimed to investigate the impact of altitude and training content on hematological characteristics by comparing young male cyclists age 15-16 and 17-18 years who were born and trained at a moderate altitude (ie, greater than or equal to 2500 m; MA) and cyclists who were born and trained at low altitude (below 1000 m; LA).

METHODS:

tHbmass (in grams and grams per kilogram), measured by using the optimized carbon monoxide rebreathing method during an incremental test on a cycle ergometer; hematocrit percentage, hemoglobin concentration; and erythrocyte, blood, and plasma volume were measured in youth male cyclists age 15-16 years and junior cyclists age 17-18 years who were born and trained at MA versus LA. All variables were analyzed with a 2-way (age [youth cyclist vs junior cyclist] × altitude level [MA vs LA]) analysis of variance with subsequent Tuckey post hoc test. RESULTS AND

CONCLUSION:

Some altitude-induced benefits were reported in cyclists at age 15-16 years in the MA group with higher values in hematocrit percentage, hemoglobin concentration, and tHbmass (grams per kilogram) (P < .05) than their LA counterparts. This was also observed at age 17-18 years (P < .001), except for tHbmass, wherein no significant difference was found between MA and LA groups. In contrast, plasma volume was lower in MA than LA junior cyclists. NEW

FINDINGS:

(1) The altitude of birth and residence could generate an advantage in tHbmass in young male cyclists age 15-16 and 17-18 years who train at MA compared with cyclists who are born and train at LA. (2) Altitude-induced benefits in physiological variables (hematocrit percentage, hemoglobin concentration, tHbmass in g·kg-1) were reported in cyclists at age 15-16 years and partially at age 17-18 years. In contrast, plasma volume was lower in MA than in LA junior cyclists. This may impact the strategies for identifying and developing talent in cycling.
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE País/Região como assunto: America do sul / Colombia Idioma: En Revista: Int J Sports Physiol Perform Assunto da revista: FISIOLOGIA / MEDICINA ESPORTIVA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE País/Região como assunto: America do sul / Colombia Idioma: En Revista: Int J Sports Physiol Perform Assunto da revista: FISIOLOGIA / MEDICINA ESPORTIVA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Colômbia País de publicação: Estados Unidos