Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
 
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Journal of Sports Science and Medicine
ISSN: 1303 - 2968
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©Journal of Sports Science and Medicine (2017) 16, 480 - 488
Research article
Effects of Hypoxic Training versus Normoxic Training on Exercise Performance in Competitive Swimmers
Hun-Young Park1, Kiwon Lim1,2,

1 Physical Activity and Performance Institute (PAPI), Konkuk University, Seoul, Republic of Korea
2 Department of Physical Education, Konkuk University, Seoul, Republic of Korea

Kiwon Lim
✉Department of Physical Education, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, Korea 143-701
Email: exercise@konkuk.ac.kr

Received:
28-07-2017 -- Accepted: 12-10-2017 --
Published (online): 01-12-2017

ABSTRACT

In swimming competition, optimal swimming performance is characterized by a variety of interchangeable components, such as aerobic exercise capacity, anaerobic power and muscular function. Various hypoxic training methods would potentiate greater performance improvements compared to similar training at sea-level. Therefore, this study aimed to evaluate the effects of six-weeks of hypoxic training on exercise performance in moderately trained competitive swimmers. Twenty swimmers were equally divided into a normoxic training group (n = 10) for residing and training at sea-level (PIO2 = 149.7 mmHg), and a hypoxic training group (n = 10) for residing at sea-level but training at 526 mmHg hypobaric hypoxic condition (PIO2 = 100.6 mmHg). Aerobic exercise capacity, anaerobic power, muscular function, hormonal response and 50 and 400 m swimming performance were measured before and after training, which was composed of warm-up, continuous training, interval training, elastic resistance training, and cool-down. The training frequency was 120 min, 3 days per week for 6 weeks. Muscular function and hormonal response parameters showed significant interaction effects (all p < 0.032, η2 > 0.288) in muscular strength and endurance, growth hormone; GH, insulin like growth factor-1; IGF-1, and vascular endothelial growth factor; VEGF. The other variables demonstrated no significant interaction effects. However, a hypoxic training group also showed significantly increased maximal oxygen consumption; VO2max (p = 0.001), peak anaerobic power (p = 0.001), and swimming performances for 50 m (p = 0.000) and 400 m (p = 0.000). These results indicated that the hypoxic training method proposed in our study is effective for improvement of muscular strength and endurance in moderately trained competitive swimmers compared to control group. However, our hypoxic training method resulted in unclear changes in aerobic exercise capacity (VO2max), anaerobic power, and swimming performance of 50 m and 400 m compared to normoxic training.

Key words: Hypoxic training, muscular strength and endurance, normoxic exercise performance, swimmers
Key Points
Hypoxic training composed or warm-up, continuous training, interval training, resistance training, elastic resistance training, and cool-down with proper methodology had a positive effect on the muscular strength, muscular endurance and hormonal response (GH, IGF-1, and VEGF) of moderately trained competitive swimmers.
Our hypoxic training method resulted in unclear changes in aerobic exercise capacity (VO2max), anaerobic power, and swimming performance of 50 m and 400 m compared to normoxic training.

 


  

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