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Effect of high‐intensity resistance circuit‐based training in hypoxia on aerobic performance and repeat sprint ability
Author(s) -
RamosCampo D. J.,
MartínezGuardado I.,
Olcina G.,
MarínPagán C.,
MartínezNoguera F. J.,
CarlosVivas J.,
Alcaraz P. E.,
Rubio J. Á.
Publication year - 2018
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/sms.13223
Subject(s) - sprint , bench press , medicine , hypoxia (environmental) , circuit training , aerobic exercise , treadmill , physical therapy , ankle , vo2 max , energy expenditure , heart rate , resistance training , cardiology , zoology , blood pressure , surgery , oxygen , chemistry , biology , organic chemistry
Recent acute studies have shown that high‐intensity resistance circuit‐based ( HRC ) training in hypoxia increases metabolic stress. However, no intervention studies have yet proven their effectiveness. This study aimed to analyze the effect of 8 weeks of HRC in hypoxia on aerobic performance, resting energy expenditure ( REE ), repeat sprint ability ( RSA ) and hematological variables. Twenty‐eight subjects were assigned to hypoxia (FiO 2 = 15%; HRC hyp : n = 15; age: 24.6 ± 6.8 years; height: 177.4 ± 5.9 cm; weight: 74.9 ± 11.5 kg) and normoxia (FiO 2 = 20.9%; HRC norm : n = 13; age: 23.2 ± 5.2 years; height: 173.4 ± 6.2 cm; weight: 69.4 ± 7.4 kg) groups. Each training session consisted of two blocks of three exercises (Block 1: bench press, leg extension, front pull down; 2: deadlift, elbow flexion, ankle extension). Each exercise was performed at 6 repetitions maximum. Participants exercised twice weekly for 8 weeks and before and after the training program blood test, REE , RSA and treadmill running test were performed. Fatigue index in the RSA test was significantly decreased in the HRC hyp (−0.9%; P < .01; ES = 2.75) but not in the HRC norm . No changes were observed in REE and hematological variables. Absolute (4.5%; P = .014; ES = 0.42) and relative (5.2%; P = .008; ES = 0.43) maximal oxygen uptake ( VO 2 max), speed at VO 2 max (4%; P = .010; ES = 0.25) and time to exhaustion (4.1%; P = .012; ES = 0.26) were significantly increased in HRC hyp but not in the HRC norm . No significant differences between groups were found. Compared with normoxic conditions, 8 weeks of HRC training under hypoxic conditions efficiently improves aerobic performance and RSA without changes in REE and red blood O 2 ‐carrying capacity.