Correspondence Between Values of Vertical Loading Rate and Oxygen Consumption During Inclined Running.
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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_296F75F13A71
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Correspondence Between Values of Vertical Loading Rate and Oxygen Consumption During Inclined Running.
Journal
Sports medicine - open
ISSN
2199-1170 (Print)
ISSN-L
2198-9761
Publication state
Published
Issued date
06/09/2022
Peer-reviewed
Oui
Volume
8
Number
1
Pages
114
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Publication Status: epublish
Abstract
The aim of this study was to provide a theoretical model to predict the vertical loading rate (VLR) at different slopes and speeds during incline running.
Twenty-nine healthy subjects running at least once a week performed in a randomized order 4-min running trials on an instrumented treadmill at various speeds (8, 10, 12, and 14 km h <sup>-1</sup> ) and slopes (- 20%, - 10%, - 5%, 0%, + 5%, + 10%, + 15%, + 20%). Heart rate, gas exchanges and ground reaction forces were recorded. The VLR was then calculated as the slope of the vertical force between 20 and 80% of the duration from initial foot contact to the impact peak.
There was no difference in VLR between the four different uphill conditions at given running speeds, but it was reduced by 27% at 5% slope and by 54% at 10% slope for the same metabolic demand (similar [Formula: see text]), when compared to level running. The average VLR measured at maximal aerobic intensity during level running would be decreased by 52.7% at + 5%, by 63.0% at + 10%, and by 73.3% at + 15% slope. Moreover, VLR was dependent on the slope in downhill conditions.
This study highlights the possibility to use uphill running to minimize rate of mechanical load (i.e., osteoarticular load) from foot impact on the ground and as a time-efficient exercise routine (i.e., same energy expenditure than in level running in less time).
Twenty-nine healthy subjects running at least once a week performed in a randomized order 4-min running trials on an instrumented treadmill at various speeds (8, 10, 12, and 14 km h <sup>-1</sup> ) and slopes (- 20%, - 10%, - 5%, 0%, + 5%, + 10%, + 15%, + 20%). Heart rate, gas exchanges and ground reaction forces were recorded. The VLR was then calculated as the slope of the vertical force between 20 and 80% of the duration from initial foot contact to the impact peak.
There was no difference in VLR between the four different uphill conditions at given running speeds, but it was reduced by 27% at 5% slope and by 54% at 10% slope for the same metabolic demand (similar [Formula: see text]), when compared to level running. The average VLR measured at maximal aerobic intensity during level running would be decreased by 52.7% at + 5%, by 63.0% at + 10%, and by 73.3% at + 15% slope. Moreover, VLR was dependent on the slope in downhill conditions.
This study highlights the possibility to use uphill running to minimize rate of mechanical load (i.e., osteoarticular load) from foot impact on the ground and as a time-efficient exercise routine (i.e., same energy expenditure than in level running in less time).
Keywords
Biomechanics, Energy cost of running, Inclined treadmill, Vertical loading rate
Pubmed
Open Access
Yes
Create date
13/09/2022 9:53
Last modification date
27/09/2022 6:39