The Influence of Different Levels of Cardiorespiratory Fitness on Exercise Performance 24 Hour Post Blood Donation in Male Donors. Malaysian Journal of Medicine and Health Sciences, 14 (SUPP1). pp. 126-133. ISSN 2636-9346 (2018)
Abstract
Introduction: Haematological parameters decrease following one unit of whole blood donation which results in a detrimental effect on cardiorespiratory fitness and maximal exercise capacity. However, it remains unclear to what
extent blood donation will impact exercise performance across varying levels of cardiorespiratory fitness. The aim of this study is to compare the effects of a standard blood donation on maximal exercise performance performed
24 h post-blood donation in individuals with varying levels of cardiorespiratory fitness.
Methods: Forty-two males (mean age 22 ± 2.1 years) were recruited and segregated into Low, Moderate and Superior fitness groups. Subjects performed a multi-stage shuttle run test on the day prior to a standard blood donation procedure, and subsequently
24 h post-blood donation. Blood samples were taken on both test days and analysed for haematological parameters.
Results: Exercise performance, represented by predicted VO2 max were 0.6%, 1.0% and 4.1% lower in the Low, Moderate and Superior fitness groups respectively. However, the magnitude of reduction was only statistically significant in the Superior fitness group (p = 0.017). Compared to baseline, all fitness groups demonstrated significant reductions in haematocrit (Low: -8.4%, Moderate: -9.1%, Superior: -7.2%) and haemoglobin (Low: -7.6%, Moderate:
-7.8%, Superior: -5.5%) levels at 24 h post-blood donation. Spearman correlation analysis revealed that changes in haemoglobin concentrations were not associated with changes in exercise performance in all groups.
Conclusion:
Exercise performance was only significantly reduced in the Superior fitness group. Well-trained individuals should be refrained from blood donation just prior to competitions.
| Item Type: | Article |
|---|---|
| Keywords: | Aerobic fitness, VO2 max, Haemoglobin, Haematocrit, Blood volume |
| Taxonomy: | |
| Agencies of Resources: | Higher Institution > Public University > Universiti Putra Malaysia > UPM-MTDC Technology Center | JTS & JSSH Only | UPM/TNCPI/UPM-JD/LibraryUiTM - 16/11/2018 |
| Local Content Hub: | Subjects > Medicine |
| Depositing User: | Asnida Md Arop (Sg. Buloh) |
| Date Deposited: | 07 Oct 2021 23:34 |
| Last Modified: | 07 Oct 2021 23:34 |
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