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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/34878

Title: Effect of Acute Exposure to Moderate Altitude on Muscle Power: Hypobaric Hypoxia vs. Normobaric Hypoxia
Authors: Feriche, Belén
García-Ramos, Amador
Calderón-Soto, Carmen
Drobnic, Franchek
Bonitch-Góngora, Juan G.
Galilea, Pedro A.
Riera, Joan
Padial Puche, Paulino
Issue Date: 2014
Abstract: When ascending to a higher altitude, changes in air density and oxygen levels affect the way in which explosive actions are executed. This study was designed to compare the effects of acute exposure to real or simulated moderate hypoxia on the dynamics of the force-velocity relationship observed in bench press exercise. Twenty-eight combat sports athletes were assigned to two groups and assessed on two separate occasions: G1 (n = 17) in conditions of normoxia (N1) and hypobaric hypoxia (HH) and G2 (n = 11) in conditions of normoxia (N2) and normobaric hypoxia (NH). Individual and complete force-velocity relationships in bench press were determined on each assessment day. For each exercise repetition, we obtained the mean and peak velocity and power shown by the athletes. Maximum power (Pmax) was recorded as the highest Pmean obtained across the complete force-velocity curve. Our findings indicate a significantly higher absolute load linked to Pmax (~3%) and maximal strength (1RM) (~6%) in G1 attributable to the climb to altitude (P<0.05). We also observed a stimulating effect of natural hypoxia on Pmean and Ppeak in the middle-high part of the curve (≥60 kg; P<0.01) and a 7.8% mean increase in barbell displacement velocity (P<0.001). No changes in any of the variables examined were observed in G2. According to these data, we can state that acute exposure to natural moderate altitude as opposed to simulated normobaric hypoxia leads to gains in 1RM, movement velocity and power during the execution of a force-velocity curve in bench press.
Sponsorship: This study has been supported by a Grant from the Ministry of education, culture and Sport of Spain, Reference 14/UPB10/07.
Publisher: Public Library of Science (PLOS)
Keywords: Hypoxia
Strength training
Medical hypoxia
URI: http://hdl.handle.net/10481/34878
ISSN: 1932-6203
Citation: Feriche, B.; et al. Effect of Acute Exposure to Moderate Altitude on Muscle Power: Hypobaric Hypoxia vs. Normobaric Hypoxia. Plos One, 9(12): e114072 (2014). [http://hdl.handle.net/10481/34878]
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