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Metabolic cost of running is greater on a treadmill with a stiffer running platform.

Discussion in 'Biomechanics, Sports and Foot orthoses' started by mike weber, Mar 10, 2017.


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    Abstract

    Exercise testing on motorised treadmills provides valuable information about running performance and metabolism; however, the impact of treadmill type on these tests has not been investigated. This study compared the energy demand of running on two laboratory treadmills: an HP Cosmos (C) and a Quinton (Q) model, with the latter having a 4.5 times stiffer running platform. Twelve experienced runners ran identical bouts on these treadmills at a range of four submaximal velocities (reported data is for the velocity that approximated 75-81% VO2max). The stiffer treadmill elicited higher oxygen consumption (C: 46.7 ± 3.8; Q: 50.1 ± 4.3 ml·kg-1 · min-1), energy expenditure (C: 16.0 ± 2.5; Q: 17.7 ± 2.9 kcal · min-1), carbohydrate oxidation (C: 9.6 ± 3.1; Q: 13.0 ± 3.9 kcal · min-1), heart rate (C: 155 ± 16; Q: 163 ± 16 beats · min-1) and rating of perceived exertion (C: 13.8 ± 1.2; Q: 14.7 ± 1.2), but lower fat oxidation (C: 6.4 ± 2.3; Q: 4.6 ± 2.5 kcal · min-1) (all analysis of variance treadmill comparisons P < 0.01). This study confirms that caution is required when comparing performance and metabolic results between different treadmills and suggests that treadmills will vary in their comparability to over-ground running depending on the running platform stiffness.
    KEYWORDS:

    Treadmill stiffness; oxygen consumption; running economy

    https://www.ncbi.nlm.nih.gov/pubmed/27575734

    Reminded of the Harvard Tunned track research

    http://biomech.media.mit.edu/wp-con...ning-on-surfaces-of-different-stiffnesses.pdf
     
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