Research article summary (published 29 Jun 2009):

Responses of hematological parameters and aerobic performance of elite men and women swimmers during a 14-week training program.

Full Abstract

The main purpose of the present investigation was to verify the responses of hematological parameters in men and women competitive swimmers during a 14-week training program. Twenty-three Olympic and international athletes were evaluated 4 times during the experiment: at the beginning of the endurance training phase (T1), at the end of the endurance training phase (T2), at the end of the quality phases (T3), and at the end of the taper period (T4). On the first day at 8:00 AM, each swimmer had a blood sample taken for the determination of hematological parameters. At 3:00 PM, the athletes had their aerobic performance measured by anaerobic threshold. On the second day at 8:00 AM, the swimmers had their aerobic performance measured by critical velocity. Hematocrit and mean corpuscular volume diminished (p < or = 0.05) from T1 to T2 (men: 5.8 and 7.2%; women: 11.6 and 6.8%), and increased (p < or = 0.05) from T2 to T3 (men: 7.2 and 6.0%; women: 7.4 and 5.2%). These results were related to the plasma volume changes of the athletes. However, these alterations do not seem to affect the swimmers' aerobic performance. For practical applications, time-trial performance is better than aerobic performance (i.e., anaerobic threshold and critical velocity) for monitoring training adaptations.

Author information

Author/s: Santhiago, Vanessa (V); da Silva, Adelino S R (AS); Papoti, Marcelo (M); Gobatto, Claudio A (CA);

Affiliation: Laboratory of Sport Applied Physiology, Department of Physical Education, Bioscience Institute, São Paulo State University, Rio Claro, Brazil.

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Journal of strength and conditioning research / National Strength & Conditioning Association (J Strength Cond Res), published in United States. (Language: eng)

Reference: 2009-Jul; vol 23 (issue 4) : pp 1097-105

Dates: Created 2009/07/01; Completed 2009/10/22;

PMID: 19528852, status: MEDLINE (last retrieval date: 10/22/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Anaerobic Threshold Analysis of Variance Blood Cell Count Blood Cells Blood Chemical Analysis Body Constitution Brazil Erythrocyte Indices Erythrocytes - physiology

Female Hematocrit Hemoglobins - analysis Humans Male Oxygen Consumption - physiology Physical Education and Training Physical Fitness Plasma Volume Swimming - physiology

Associated Chemicals: Hemoglobins (0)

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