| Muscular and metabolic costs of uphill backpacking: are hiking poles beneficial? | |
MedLine Citation:
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PMID: 11128857 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The purpose of the present study was to compare pole and no-pole conditions during uphill backpacking, which was simulated on an inclined treadmill with a moderately heavy (22.4 kg, 30% body mass) backpack. METHODS: Physiological measurements of oxygen consumption, heart rate, and RPE were taken during 1 h of backpacking in each condition, along with joint kinematic and electromyographic comparisons from data collected during a third test session. RESULTS: The results showed that although imposing no metabolic consequence, pole use elicited a longer stride length (1.27 vs 1.19 m), kinematics that were more similar to those of unloaded walking, and reduced activity in several lower extremity muscles. Although pole use evoked a greater heart rate (113.5 vs 107 bpm), subjects were backpacking more comfortably as indicated by their ratings of perceived exertion (10.8 vs 11.6). The increased cardiovascular demand was likely to support the greater muscular activity in the upper extremity, as was observed in triceps brachii. CONCLUSION: By redistributing some of the backpack effort, pole use alleviated some stress from the lower extremities and allowed a partial reversal of typical load-bearing strategies. |
Authors:
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C A Knight; G E Caldwell |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 32 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2000 Dec |
Date Detail:
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Created Date: 2000-12-20 Completed Date: 2001-04-12 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 2093-101 Citation Subset: IM; S |
Affiliation:
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Department of Exercise Science, University of Massachusetts, Amherst 01003, USA. caknight@excsci.umass.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Biomechanics Electromyography Energy Metabolism Female Gait / physiology Heart Rate Humans Male Middle Aged Oxygen Consumption Physical Exertion / physiology Sports / physiology* Sports Equipment* Walking / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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