Effects of Resistance Training in Hypobaric vs. Normobaric Hypoxia on Circulating Ions and Hormones

Rafael Timon, Guillermo Olcina, Paulino Padial, Juan Bonitch-Góngora, Ismael Martínez-Guardado, Cristina Benavente, Blanca de la Fuente and Belen Feriche
Additional contact information
Rafael Timon: Faculty of Sport Sciences, Universidad de Extremadura, 10003 Caceres, Spain
Guillermo Olcina: Faculty of Sport Sciences, Universidad de Extremadura, 10003 Caceres, Spain
Paulino Padial: Department of Physical Education and Sport, Faculty of Sport Sciences, Universidad de Granada, 18011 Granada, Spain
Juan Bonitch-Góngora: Department of Physical Education and Sport, Faculty of Sport Sciences, Universidad de Granada, 18011 Granada, Spain
Ismael Martínez-Guardado: BRABE Group, Faculty of Life and Nature Sciences, Universidad de Nebrija, 28248 Madrid, Spain
Cristina Benavente: Department of Physical Education and Sport, Faculty of Sport Sciences, Universidad de Granada, 18011 Granada, Spain
Blanca de la Fuente: High Performance Center of Sierra Nevada, Spanish Sport Council, 18196 Granada, Spain
Belen Feriche: Department of Physical Education and Sport, Faculty of Sport Sciences, Universidad de Granada, 18011 Granada, Spain

IJERPH, 2022, vol. 19, issue 6, 1-11

Abstract: Hypobaric hypoxia (HH) seems to lead to different responses compared to normobaric hypoxia (NH) during physical conditioning. The aim of the study was to analyze the hormonal and circulating ion responses after performing high-intensity resistance training with different inter-set rest under HH and NH condition. Sixteen male volunteers were randomly divided into two training groups. Each group completed two counterbalanced resistance training sessions (three sets × ten repetitions, remaining two repetitions in reserve), with both one- and two-minute inter-set rest, under HH and NH. Blood samples were obtained to determine hormones and circulating ions (Ca 2+ , Pi, and HCO 3 − ) at baseline and after training sessions (5, 10, and 30 min). Resistance training with one-minute rest caused greater hormonal stress than with two-minute rest in cortisol and growth hormone, although the hypoxic environmental condition did not cause any significant alterations in these hormones. The short inter-set rest also caused greater alterations in HCO 3 − and Pi than the longer rest. Additionally, higher levels of Ca 2+ and Pi, and lower levels of HCO 3 − , were observed after training in HH compared to NH. Metabolic and physiological responses after resistance training are mediated by inter-set rest intervals and hypoxic environmental condition. According to the alterations observed in the circulating ions, HH could cause greater muscular fatigue and metabolic stress than NH.

Keywords: growth hormone; cortisol; inorganic phosphate; bicarbonate anion; resistance training; hypoxia (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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