Abstract
The effect of two running sessions completed within a 12-h period on hemolysis, inflammation, and hepcidin activity in endurance athletes was investigated. Ten males completed two experimental trials in a randomized, counterbalanced order. The two trials included (a) a one-running-session trial (T1) including 10 × 1 km interval repeats (90% peak \( \dot{V}{\text{O}}_{2} \) velocity), and (b) a two-running-session trial (T2), comprising a continuous 10-km run (70% peak \( \dot{V}{\text{O}}_{2} \) velocity), and a 10 × 1 km interval run (90% peak \( \dot{V}{\text{O}}_{2} \) velocity) completed 12 h later. Interleukin-6 (IL-6), free hemoglobin (Hb), haptoglobin (Hp), iron, ferritin, and hepcidin were assessed post-exercise. After the T1 and T2 interval runs, free Hb was significantly increased and Hp significantly decreased (p ≤ 0.05), with a cumulative effect shown in T2 after the second run (p ≤ 0.05). The IL-6, serum iron, ferritin, and hepcidin activity were increased after each running session (p ≤ 0.05), with no cumulative effect in T2. In conclusion, a cumulative effect of two running sessions on hemolysis was shown, but no similar effect with inflammation and hepcidin activity was evident.
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Acknowledgments
The authors wish to acknowledge the grant funding received from the Fremantle Hospital Medical Research Foundation. The authors would also like to acknowledge the grant funding received from the University of Western Australia’s Research Grant Scheme. Grant funding for this project was received from the Fremantle Hospital Medical Research Foundation, and the University of Western Australia’s Research Grant Scheme.
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Peeling, P., Dawson, B., Goodman, C. et al. Cumulative effects of consecutive running sessions on hemolysis, inflammation and hepcidin activity. Eur J Appl Physiol 106, 51–59 (2009). https://doi.org/10.1007/s00421-009-0988-7
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DOI: https://doi.org/10.1007/s00421-009-0988-7