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 VO2max 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.
| Original language | English |
|---|---|
| Pages (from-to) | 126-133 |
| Number of pages | 8 |
| Journal | Malaysian Journal of Medicine and Health Sciences |
| Volume | 14 |
| Publication status | Published - 1 Jan 2018 |
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Keywords
- Aerobic fitness
- Blood volume
- Haematocrit
- Haemoglobin
- VOmax
ASJC Scopus subject areas
- Medicine(all)
Cite this
The influence of different levels of cardiorespiratory fitness on exercise performance 24 hour post blood donation in Male donors. / Mail, Jamaludin; Mohamed, Rafeezul; Mohamad Fauzi, Nor Farah; Aziz, Abdul Rashid; Muhamed, Ahmad Munir Che.
In: Malaysian Journal of Medicine and Health Sciences, Vol. 14, 01.01.2018, p. 126-133.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The influence of different levels of cardiorespiratory fitness on exercise performance 24 hour post blood donation in Male donors
AU - Mail, Jamaludin
AU - Mohamed, Rafeezul
AU - Mohamad Fauzi, Nor Farah
AU - Aziz, Abdul Rashid
AU - Muhamed, Ahmad Munir Che
PY - 2018/1/1
Y1 - 2018/1/1
N2 - 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 VO2max 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.
AB - 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 VO2max 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.
KW - Aerobic fitness
KW - Blood volume
KW - Haematocrit
KW - Haemoglobin
KW - VOmax
UR - http://www.scopus.com/inward/record.url?scp=85068599877&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85068599877&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85068599877
VL - 14
SP - 126
EP - 133
JO - Malaysian Journal of Medicine and Health Sciences
JF - Malaysian Journal of Medicine and Health Sciences
SN - 1675-8544
ER -