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Effect of high-intensity resistance circuit-based training in hypoxia on aerobic performance and repeat sprint ability.

Abstract：

: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 (FiO2 = 15%; HRChyp : n = 15; age: 24.6 ± 6.8 years; height: 177.4 ± 5.9 cm; weight: 74.9 ± 11.5 kg) and normoxia (FiO2 = 20.9%; HRCnorm : 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 HRChyp (-0.9%; P < .01; ES = 2.75) but not in the HRCnorm . 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 (VO2 max), speed at VO2 max (4%; P = .010; ES = 0.25) and time to exhaustion (4.1%; P = .012; ES = 0.26) were significantly increased in HRChyp but not in the HRCnorm . 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 O2 -carrying capacity.

journal_name

Scand J Med Sci Sports

journal_title

Scandinavian journal of medicine & science in sports

authors

Ramos-Campo DJ,Martínez-Guardado I,Olcina G,Marín-Pagán C,Martínez-Noguera FJ,Carlos-Vivas J,Alcaraz PE,Rubio JÁ

doi

10.1111/sms.13223

subject

Has Abstract

pub_date

2018-10-01 00:00:00

pages

2135-2143

issue

eissn

0905-7188

issn

1600-0838

journal_volume

pub_type

杂志文章,随机对照试验

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Effect of high-intensity resistance circuit-based training in hypoxia on aerobic performance and repeat sprint ability.