Year-To-Year variability in haemoglobin mass response to two altitude training camps

Blake D. McLean, David Buttifant, Christopher J. Gore, Kevin White, Justin Kemp

Research output: Contribution to journalArticle

16 Citations (Scopus)
1 Downloads (Pure)

Abstract

Aim To quantify the year-to-year variability of altitudeinduced changes in haemoglobin mass (Hbmass) in elite team-sport athletes. Methods 12 Australian-Footballers completed a 19-day (ALT1) and 18-day (ALT2) moderate altitude (~2100 m), training camp separated by 12 months. An additional 20 participants completed only one of the two training camps (ALT1 additional n=9, ALT2 additional n=11). Total Hbmass was assessed using carbon monoxide rebreathing before (PRE), after (POST1) and 4 weeks after each camp. The typical error of Hbmass for the pooled data of all 32 participants was 2.6%. A contemporary statistics analysis was used with the smallest worthwhile change set to 2% for Hbmass. Results POST1 Hbmass was very likely increased in ALT1 (3.6±1.6%, n=19; mean±~90 CL) as well as ALT2 (4.4±1.3%, n=23) with an individual responsiveness of 1.3% and 2.2%, respectively. There was a small correlation between ALT1 and ALT2 (R=0.21, p=0.59) for a change in Hbmass, but a moderately inverse relationship between the change in Hbmass and initial relative Hbmass (g/kg (R=-0.51, p=0.04)). Conclusions Two preseason moderate altitude camps 1 year apart yielded a similar (4%) mean increase in Hbmass of elite footballers, with an individual responsiveness of approximately half the group mean effect, indicating that most players gained benefit. Nevertheless, the same individuals generally did not change their Hbmass consistently from year to year. Thus, a 'responder' or 'non-responder' to altitude for Hbmass does not appear to be a fixed trait.

Original languageEnglish
Pages (from-to)51-58
Number of pages8
JournalBritish Journal of Sports Medicine
Volume47
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Dec 2013
Externally publishedYes

Fingerprint

Hemoglobins
Carbon Monoxide
Athletes
Sports

Cite this

McLean, Blake D. ; Buttifant, David ; Gore, Christopher J. ; White, Kevin ; Kemp, Justin. / Year-To-Year variability in haemoglobin mass response to two altitude training camps. In: British Journal of Sports Medicine. 2013 ; Vol. 47, No. SUPPL. 1. pp. 51-58.
@article{e38d70075b9f4949b15d15d7ea109c76,
title = "Year-To-Year variability in haemoglobin mass response to two altitude training camps",
abstract = "Aim To quantify the year-to-year variability of altitudeinduced changes in haemoglobin mass (Hbmass) in elite team-sport athletes. Methods 12 Australian-Footballers completed a 19-day (ALT1) and 18-day (ALT2) moderate altitude (~2100 m), training camp separated by 12 months. An additional 20 participants completed only one of the two training camps (ALT1 additional n=9, ALT2 additional n=11). Total Hbmass was assessed using carbon monoxide rebreathing before (PRE), after (POST1) and 4 weeks after each camp. The typical error of Hbmass for the pooled data of all 32 participants was 2.6{\%}. A contemporary statistics analysis was used with the smallest worthwhile change set to 2{\%} for Hbmass. Results POST1 Hbmass was very likely increased in ALT1 (3.6±1.6{\%}, n=19; mean±~90 CL) as well as ALT2 (4.4±1.3{\%}, n=23) with an individual responsiveness of 1.3{\%} and 2.2{\%}, respectively. There was a small correlation between ALT1 and ALT2 (R=0.21, p=0.59) for a change in Hbmass, but a moderately inverse relationship between the change in Hbmass and initial relative Hbmass (g/kg (R=-0.51, p=0.04)). Conclusions Two preseason moderate altitude camps 1 year apart yielded a similar (4{\%}) mean increase in Hbmass of elite footballers, with an individual responsiveness of approximately half the group mean effect, indicating that most players gained benefit. Nevertheless, the same individuals generally did not change their Hbmass consistently from year to year. Thus, a 'responder' or 'non-responder' to altitude for Hbmass does not appear to be a fixed trait.",
author = "McLean, {Blake D.} and David Buttifant and Gore, {Christopher J.} and Kevin White and Justin Kemp",
year = "2013",
month = "12",
doi = "10.1136/bjsports-2013-092744",
language = "English",
volume = "47",
pages = "51--58",
journal = "British Journal of Sports Medicine",
issn = "0306-3674",
publisher = "BMJ Publishing Group",
number = "SUPPL. 1",

}

Year-To-Year variability in haemoglobin mass response to two altitude training camps. / McLean, Blake D.; Buttifant, David; Gore, Christopher J.; White, Kevin; Kemp, Justin.

In: British Journal of Sports Medicine, Vol. 47, No. SUPPL. 1, 12.2013, p. 51-58.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Year-To-Year variability in haemoglobin mass response to two altitude training camps

AU - McLean, Blake D.

AU - Buttifant, David

AU - Gore, Christopher J.

AU - White, Kevin

AU - Kemp, Justin

PY - 2013/12

Y1 - 2013/12

N2 - Aim To quantify the year-to-year variability of altitudeinduced changes in haemoglobin mass (Hbmass) in elite team-sport athletes. Methods 12 Australian-Footballers completed a 19-day (ALT1) and 18-day (ALT2) moderate altitude (~2100 m), training camp separated by 12 months. An additional 20 participants completed only one of the two training camps (ALT1 additional n=9, ALT2 additional n=11). Total Hbmass was assessed using carbon monoxide rebreathing before (PRE), after (POST1) and 4 weeks after each camp. The typical error of Hbmass for the pooled data of all 32 participants was 2.6%. A contemporary statistics analysis was used with the smallest worthwhile change set to 2% for Hbmass. Results POST1 Hbmass was very likely increased in ALT1 (3.6±1.6%, n=19; mean±~90 CL) as well as ALT2 (4.4±1.3%, n=23) with an individual responsiveness of 1.3% and 2.2%, respectively. There was a small correlation between ALT1 and ALT2 (R=0.21, p=0.59) for a change in Hbmass, but a moderately inverse relationship between the change in Hbmass and initial relative Hbmass (g/kg (R=-0.51, p=0.04)). Conclusions Two preseason moderate altitude camps 1 year apart yielded a similar (4%) mean increase in Hbmass of elite footballers, with an individual responsiveness of approximately half the group mean effect, indicating that most players gained benefit. Nevertheless, the same individuals generally did not change their Hbmass consistently from year to year. Thus, a 'responder' or 'non-responder' to altitude for Hbmass does not appear to be a fixed trait.

AB - Aim To quantify the year-to-year variability of altitudeinduced changes in haemoglobin mass (Hbmass) in elite team-sport athletes. Methods 12 Australian-Footballers completed a 19-day (ALT1) and 18-day (ALT2) moderate altitude (~2100 m), training camp separated by 12 months. An additional 20 participants completed only one of the two training camps (ALT1 additional n=9, ALT2 additional n=11). Total Hbmass was assessed using carbon monoxide rebreathing before (PRE), after (POST1) and 4 weeks after each camp. The typical error of Hbmass for the pooled data of all 32 participants was 2.6%. A contemporary statistics analysis was used with the smallest worthwhile change set to 2% for Hbmass. Results POST1 Hbmass was very likely increased in ALT1 (3.6±1.6%, n=19; mean±~90 CL) as well as ALT2 (4.4±1.3%, n=23) with an individual responsiveness of 1.3% and 2.2%, respectively. There was a small correlation between ALT1 and ALT2 (R=0.21, p=0.59) for a change in Hbmass, but a moderately inverse relationship between the change in Hbmass and initial relative Hbmass (g/kg (R=-0.51, p=0.04)). Conclusions Two preseason moderate altitude camps 1 year apart yielded a similar (4%) mean increase in Hbmass of elite footballers, with an individual responsiveness of approximately half the group mean effect, indicating that most players gained benefit. Nevertheless, the same individuals generally did not change their Hbmass consistently from year to year. Thus, a 'responder' or 'non-responder' to altitude for Hbmass does not appear to be a fixed trait.

UR - http://www.scopus.com/inward/record.url?scp=84888588531&partnerID=8YFLogxK

U2 - 10.1136/bjsports-2013-092744

DO - 10.1136/bjsports-2013-092744

M3 - Article

VL - 47

SP - 51

EP - 58

JO - British Journal of Sports Medicine

JF - British Journal of Sports Medicine

SN - 0306-3674

IS - SUPPL. 1

ER -