| Effects of low-load resistance training combined with blood flow restriction or hypoxia on muscle function and performance in netball athletes. | |
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MedLine Citation:
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PMID: 22999393 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVES: To investigate the effect of blood flow restriction or normobaric hypoxic exposure combined with low-load resistant exercise (LRE), on muscular strength and endurance. DESIGN: A randomised controlled trial. METHODS: Well-trained netball players (n=30) took part in a 5 weeks training of knee flexor and extensor muscles in which LRE (20% of one repetition maximum) was combined with (1) an occlusion pressure of approximately 230mmHg around the upper thigh (KT, n=10), (2) hypoxic air to generate blood oxyhaemoglobin levels of approximately 80% (HT, n=10) or (3) with no additional stimulus (CT, n=10). The training was of the same intensity and amount in all groups. One to five days before and after training, participants performed a series of strength and endurance tests of the lower limbs (3-s maximal voluntary contraction [MVC(3)], area under 30-s force curve [MVC(30)], number of repetitions at 20% 1RM [Reps201RM]). In addition, the cross-sectional area (CSA) of the quadriceps and hamstrings were measured. RESULTS: Relative to CT, KT and HT increased MVC(3) (11.0±11.9% and 15.0±13.1%), MVC(30) (10.2±9.0% and 18.3±17.4%) and Reps201RM (28.9±23.7% and 23.3±24.0%, mean±90% confidence interval) after training. CSA increased by 6.6±4.5%, 6.1±5.1% and 2.9±2.7% in the KT, HT and CT groups respectively. CONCLUSIONS: LRE in conjunction with KT or HT can provide substantial improvements in muscle strength and endurance and may be useful alternatives to traditional training practices. |
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Authors:
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Apiwan Manimmanakorn; Michael J Hamlin; Jenny J Ross; Robert Taylor; Nuttaset Manimmanakorn |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-9-18 |
Journal Detail:
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Title: Journal of science and medicine in sport / Sports Medicine Australia Volume: - ISSN: 1878-1861 ISO Abbreviation: J Sci Med Sport Publication Date: 2012 Sep |
Date Detail:
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Created Date: 2012-9-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812598 Medline TA: J Sci Med Sport Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Social Sciences, Parks, Recreation, Tourism and Sport, Lincoln University, New Zealand. Electronic address: apiwanta@yahoo.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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