Details

Autor(en) / Beteiligte

• Kon, Michihiro
• Ebi, Yoshiko
• Nakagaki, Kohei

Titel

Hormonal, metabolic, and angiogenic responses to all-out sprint interval exercise under systemic hyperoxia

Ist Teil von

• Growth hormone & IGF research, 2022-04, Vol.63, p.101445-101445, Article 101445

Ort / Verlag

Scotland: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• Hyperoxic gas inhalation during exercise may negatively affect all-out sprint interval exercise (SIE)-induced hormonal, metabolic, and angiogenic responses. We investigated the effects of acute all-out SIE under systemic hyperoxia on hormonal, metabolic, and angiogenic responses. This was a randomised-crossover trial. Ten healthy males (mean ± standard error of age = 23.1 ± 0.9 years; height = 171.0 ± 1.6 cm; body mass = 66.2 ± 2.0 kg; body mass index = 22.6 ± 0.5 kg/m2) completed the following two experimental regimens: 1) SIE under normoxia and 2) SIE under systemic hyperoxia (FiO2 = 60%). The subjects performed four bouts of 30-s maximal cycling efforts with 4 min recovery between efforts. The circulating levels of hormonal (growth hormone, epinephrine, and norepinephrine), metabolic (glucose, free fatty acid, and lactate), and angiogenic (vascular endothelial growth factor, matrix metalloproteinase-2 and -9, and endostatin) markers were measured before and at 0 (immediately after the regimen), 30, and 120 min after both regimens. In response to both SIE regimens, the peak and mean power outputs gradually decreased over the intermittent exercise session compared with those in the first bout (p < 0.01) with no significant differences between the regimens. Both regimens significantly increased the circulating concentrations of all hormonal, metabolic, and angiogenic markers (p < 0.01). However, there were no significant differences in the levels of these markers in response to the two regimens at any time point (p > 0.05). These findings suggest that acute systemic hyperoxia does not influence the hormonal, metabolic, and angiogenic responses to all-out SIE. •Hyperoxic & normoxic SIE induce similar growth hormone and free fatty acids levels.•Hyperoxic and normoxic SIE induce similar increases in VEGF level.•Hyperoxia may not affect SIE-induced hormonal, metabolic, and angiogenic responses.