Abstract
Objectives
The study investigated the effect of combined sprint and resistance training (CSRT) on red blood cell (RBC) count, hemoglobin (Hb), hematocrit (Hct), plasma volume (PV) variation at rest and during exercise.
Equipment and methods
Twenty-eight moderately trained were randomly assigned into a young trained (YT), young control (YC), middle-aged trained (MAT), and middle-aged control (MAC) group. Before (P1), and after (P2) CSRT, blood samples were collected at rest and after exercise.
Results
At P1, Hct was significantly (P < .05) greater in young compared to middle-aged groups. At P1, PV decrease during exercise was significantly (P < .05) higher in middle-aged compared to young groups. Following CSRT, resting RBC count and Hb increased significantly (P < .05) in MAT. At P2, Following CSRT, Hct decreased significantly (P < .05) in trained groups. At P2, no significant (P > .05) age-effect between MAT and YT was observed for Hct.
Conclusion
CSRT increases RBC count and Hb in middle-aged men, and ameliorates the effect of age in Hct. Such adaptations may improve cardiovascular fitness of middle-aged individuals, and may be preventative of subsequent declines with age.
The study investigated the effect of combined sprint and resistance training (CSRT) on red blood cell (RBC) count, hemoglobin (Hb), hematocrit (Hct), plasma volume (PV) variation at rest and during exercise.
Equipment and methods
Twenty-eight moderately trained were randomly assigned into a young trained (YT), young control (YC), middle-aged trained (MAT), and middle-aged control (MAC) group. Before (P1), and after (P2) CSRT, blood samples were collected at rest and after exercise.
Results
At P1, Hct was significantly (P < .05) greater in young compared to middle-aged groups. At P1, PV decrease during exercise was significantly (P < .05) higher in middle-aged compared to young groups. Following CSRT, resting RBC count and Hb increased significantly (P < .05) in MAT. At P2, Following CSRT, Hct decreased significantly (P < .05) in trained groups. At P2, no significant (P > .05) age-effect between MAT and YT was observed for Hct.
Conclusion
CSRT increases RBC count and Hb in middle-aged men, and ameliorates the effect of age in Hct. Such adaptations may improve cardiovascular fitness of middle-aged individuals, and may be preventative of subsequent declines with age.
Original language | English |
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Pages (from-to) | e13-e21 |
Number of pages | 9 |
Journal | Science and Sports |
Volume | 36 |
Issue number | 1 |
Early online date | 25 Jan 2020 |
DOIs | |
Publication status | E-pub ahead of print - 25 Jan 2020 |
Externally published | Yes |
Keywords
- blood viscosity
- muscle blood flow
- red blood cells
- sports anemia
- training effect