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- Title
Correspondence Between Values of Vertical Loading Rate and Oxygen Consumption During Inclined Running.
- Authors
Lemire, Marcel; Falbriard, Mathieu; Aminian, Kamiar; Pavlik, Eloïse; Millet, Grégoire P.; Meyer, Frédéric
- Abstract
Purpose: 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. Methods: 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−1) 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. Results: 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 V ˙ O 2 ), 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. Conclusion: 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).
- Subjects
EXPERIMENTAL design; AEROBIC capacity; ENERGY metabolism; RUNNING; BLOOD gases analysis; OXYGEN consumption; MATHEMATICAL models; THEORY; HEART beat; DESCRIPTIVE statistics; BIOMECHANICS; GROUND reaction forces (Biomechanics)
- Publication
Sports Medicine - Open, 2022, Vol 8, Issue 1, p1
- ISSN
2199-1170
- Publication type
Article
- DOI
10.1186/s40798-022-00491-2