File(s) not publicly available
Influence of blood donation on the incidence of plateau at VO2max
journal contribution
posted on 2023-07-26, 14:17 authored by Dan Gordon, Madeleine Wood, Andrew Porter, Vignesh Vetrivel, Marie Gernigon, Oliver Caddy, Viviane Merzbach, Don Keiller, James Baker, Richard BarnesPurpose
The purpose of this study was to examine the effects of reductions in blood volume and associated oxygen-carrying capacity on the incidence of plateau at V˙O 2max.
Methods
Fifteen well-trained athletes (age 23.3 ± 4.5; mass 77.4 ± 13.1 kg, height 180.1 ± 6.0 cm) completed three incremental cycle tests to volitional exhaustion, of which the first was defined as familiarisation, with the remaining two trials forming the experimental conditions of pre- (UBL) and post-(BLE) blood donation (~450 cm3). The work rate for the incremental tests commenced at 100 W for 60 s followed by a ramp of 0.42 W s−1, with cadence being held constant at 80 rpm. Throughout all trials, V˙O 2 was determined on a breath-by-breath basis using a pre-calibrated metabolic cart. The criteria for plateau determination was a ∆ V˙O 2 ≤ 50 ml min−1 over the final two consecutive 30 s sampling periods.
Results
Despite a significant (P = 0.0028) 9.4 % reduction in haemoglobin concentration and 10.8 % (P = 0.016) reduction in erythrocyte count between UBL and BLE, there was no change in plateau incidence. However, significant differences were observed for both V˙O 2max (P = 0.0059) 51.3 ± 7.6 (UBL) 48.4 ± 7.9 ml kg−1 min−1 (BLE) and gas exchange threshold arrival time 383.4 ± 85.2 s (UBL) 349.2 ± 71.4 s (BLE) (P = 0.0028).
Conclusion
These data suggest that plateau at V˙O 2max is unaffected by O2 availability lending support to the notion of the plateau being dependent on the anaerobic capacity and the classically orientated concept of V˙O 2max.
History
Refereed
- Yes
Volume
114Issue number
1Page range
21-27Publication title
European Journal of Applied PhysiologyISSN
1439-6327External DOI
Publisher
SpringerLanguage
- other
Official URL
Legacy posted date
2018-03-09Legacy Faculty/School/Department
ARCHIVED Faculty of Science & Technology (until September 2018)Usage metrics
Categories
No categories selectedLicence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC