Combined intermittent hypoxic exposure at rest and continuous hypoxic training can maintain elevated hemoglobin mass after a hypoxic camp
Peltonen, J. E., Leppävuori, A., Lehtonen, E., Mikkonen, R. S., Kettunen, O., Nummela, A., Ohtonen, O., Gagnon, D. D., Wehrlin, J. P., Wilber, R. L., & Linnamo, V. (2024). Combined intermittent hypoxic exposure at rest and continuous hypoxic training can maintain elevated hemoglobin mass after a hypoxic camp. Journal of Applied Physiology, In Press. https://doi.org/10.1152/japplphysiol.00017.2024
Julkaistu sarjassa
Journal of Applied PhysiologyTekijät
Päivämäärä
2024Pääsyrajoitukset
Embargo päättyy: 2025-07-05Pyydä artikkeli tutkijalta
Tekijänoikeudet
© 2024 American Physiological Society
Athletes use hypoxic living and training to increase hemoglobin mass (Hbmass), but Hbmass declines rapidly upon return to sea level. We investigated whether Intermittent Hypoxic Exposure (IHE) + Continuous Hypoxic Training (CHT) after return to sea level maintained elevated Hbmass, and if changes in Hbmass were transferred to changes in maximal oxygen uptake (V̇O2max) and exercise performance. Hbmass was measured in 58 endurance athletes before (PRE), after (POST1), and 30 days after (POST2) a 27 ± 4-day training camp in hypoxia (n=44, HYP) or at sea level (n=14, SL). After return to sea level, 22 athletes included IHE (2 h rest) + CHT (1 h training) into their training every third day for one month (HYPIHE+CHT), whereas the other 22 HYP athletes were not exposed to IHE or CHT (HYPSL). Hbmass increased from PRE to POST1 in both HYPIHE+CHT (4.4 ± 0.7%, mean ± SEM) and HYPSL (4.1 ± 0.6%) (both p<0.001). Compared to PRE, Hbmass at POST2 remained 4.2 ± 0.8% higher in HYPIHE+CHT (p<0.001) and1.9 ± 0.5% higher in HYPSL (p=0.023), indicating a significant difference between the groups (p=0.002). In SL, no significant changes were observed in Hbmass with mean alterations between -0.5% and 0.4%. V̇O2max and time to exhaustion during an incremental treadmill test (n=35) were elevated from PRE to POST2 only in HYPIHE+CHT (5.8 ± 1.2% and 5.4 ± 1.4%, respectively, both p<0.001). IHE+CHT possesses the potential to mitigate the typical decline in Hbmass commonly observed during the initial weeks after return to sea level.
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Julkaisija
American Physiological SocietyISSN Hae Julkaisufoorumista
8750-7587Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/221089820
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Lisätietoja rahoituksesta
This study was financially supported as follows: 1) Helsinki: Ministry of Education and Culture, Finland (OKM/128/626/2021; OKM/39/626/2022; OKM/67/626/2023) and Urheiluopistosäätiö (12/10/2021); 2) Vuokatti: Joint Authority of Kainuu region (ERDF, 308764), Ministry of Education and Culture (OKM/3/626/2022).Lisenssi
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