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KMID : 1101720170210010001
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Physical Activity and Nutrition
2017 Volume.21 No. 1 p.1 ~ p.6
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Four-week “living high training low” program enhances 3000-m and 5000-m time trials by improving energy metabolism during submaximal exercise in athletes
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Park Hun-Young
Kim Sung-Ho
Nam Sang-Seok
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Abstract
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Purpose: This study aimed to determine the effect of a 4-week living high training low (LHTL) versus a living low training low (LLTL) program on energy metabolism during submaximal exercise and 3000-m and 5000-m time trial (TT) in athletes.
Methods: Male athletes (n = 20) were randomly assigned to the LLTL (n = 10, living at 1000 m and training at 700?1330 m) and LHTL (n = 10, living at simulated 3000 m and training at 700?1330 m) groups. We compared energy metabolisms during submaximal exercise on a treadmill and aerobic exercise performance (3000 m and 5000 m TT) before and after 4 weeks of training.
Results: As expected, the LHTL group demonstrated enhanced energy metabolism during submaximal exercise via significant interaction (time × group) in heart rate, oxygen consumption, and carbon dioxide excretion; these variables were significantly decreased in the LHTL group compared with the LLTL group. Additionally, both training groups revealed significantly decreased blood lactate levels during submaximal exercise, 3000 m TT, and 5000 m TT but significant interactions (time × group) in the 3000 m and 5000 m TT. Thus, the LHTL group demonstrated greater improvements in 3000 m and 5000 m TT than the LLTL group via significant interactions.
Conclusion: Our results suggest that 4-week LHTL intervention enhances 3000 m and 5000 m TT by improving energy metabolism during submaximal exercise. The proposed LHTL intervention in this study is a novel and effective method for improving aerobic exercise performance in male athletes.
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KEYWORD
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Living high training low (LHTL), Energy metabolism, Aerobic exercise performance, Time trial, Athletes
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