NDLI: Seasonal variation of haemoglobin mass in internationally competitive female road cyclists

Content Provider	Springer Nature Link
Author	Garvican, Laura A. Martin, David T. McDonald, Warren Gore, Christopher J.
Copyright Year	2010
Abstract	In order to quantify the seasonal variability of haemoglobin mass (Hbmass) in cyclists during a competitive season, and investigate whether variability is associated with changes in training load or performance, Hbmass was measured in 10 internationally competitive female road cyclists approximately once per month for 2–10 months via CO-rebreathing. Power meters were used to quantify daily load (Training Stress Scores) during training and racing, from which cumulative training load units for 7, 14, 28 and 42 day were calculated. Maximal mean power (MMP) for 1, 4, 10 and 25 min, performed during training or racing was used as a surrogate for performance. The relationship between changes in training load (%ΔTraining) and changes in Hbmass (%ΔHbmass), and between %ΔHbmass and changes in MMP (%ΔMMP) was established via regression analysis. Individual coefficients of variation (CV) in Hbmass ranged from 2.0 to 4.4%. The weighted mean CV in Hbmass was 3.3% (90% Confidence Limits: 2.9–3.8%) or 23 g over the average 6.6 ± 2.3 month monitoring period. The effect of %ΔTraining on %ΔHbmass was small for 7 and 14 day (r = 0.22 and 0.29), moderate for 42 day (r = 0.35) and large for 28 day (r = 0.56). The regression slope was greatest for 42 day, with a 10% change in training associated with a ~1% change in Hbmass. The relationship between %ΔHbmass and %ΔMMP was ~0.5:1 for MMP1min,10min and 25min and ~1:1 for MMP4min, respectively. Hbmass varies by ~3% in female cyclists during a competitive season. Some of the variation may be related to oscillations in chronic training load.
Starting Page	221
Ending Page	231
Page Count	11
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	109
Issue Number	2
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-01-08
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Haemoglobin mass variability Training adaptation Erythropoiesis Cycling training Biological passport Carbon monoxide rebreathing Sports Medicine Occupational Medicine/Industrial Medicine Human Physiology
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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