Disentangling the energetic costs of step time asymmetry and step length asymmetry in human walking.

The Journal of Experimental Biology
Jan Stenum, Julia T Choi

Abstract

The metabolic cost of walking in healthy individuals increases with spatiotemporal gait asymmetries. Pathological gait, such as post-stroke, often has asymmetry in step length and step time which may contribute to an increased energy cost. But paradoxically, enforcing step length symmetry does not reduce metabolic cost of post-stroke walking. The isolated and interacting costs of asymmetry in step time and step length remain unclear, because previous studies did not simultaneously enforce spatial and temporal gait asymmetries. Here, we delineate the isolated costs of asymmetry in step time and step length in healthy human walking. We first show that the cost of step length asymmetry is predicted by the cost of taking two non-preferred step lengths (one short and one long), but that step time asymmetry adds an extra cost beyond the cost of non-preferred step times. The metabolic power of step time asymmetry is about 2.5 times greater than the cost of step length asymmetry. Furthermore, the costs are not additive when walking with asymmetric step time and asymmetric step length: the metabolic power of concurrent asymmetry in step length and step time is driven by the cost of step time asymmetry alone. The metabolic power of asymm...Continue Reading

Associated Datasets

References

Feb 24, 2001·Prosthetics and Orthotics International·E IsakovN Benjuya
Jul 31, 2001·Journal of Biomechanical Engineering·A D Kuo
Mar 1, 2002·Gait & Posture·Burke Gurney
Jan 27, 2005·The Journal of Experimental Biology·Jiro DokeArthur D Kuo
Jun 19, 2007·The Journal of Experimental Biology·Jiro Doke, Arthur D Kuo
Sep 4, 2007·The Journal of Experimental Biology·Brian R Umberger, Philip E Martin
Jan 30, 2008·Archives of Physical Medicine and Rehabilitation·Kara K PattersonWilliam E McIlroy
Feb 17, 2009·The Journal of Experimental Biology·Kotaro SasakiSteven A Kautz
Apr 2, 2010·Journal of the Royal Society, Interface·Brian R Umberger
Jun 15, 2010·Journal of the Royal Society, Interface·Manoj Srinivasan
Nov 3, 2010·Neurorehabilitation and Neural Repair·Melvyn Roerdink, Peter J Beek
Nov 30, 2010·The Journal of Experimental Biology·Karl E Zelik, Arthur D Kuo
May 5, 2012·Gait & Posture·G StoquartT M Lejeune
Dec 19, 2012·The Journal of Physiology·James M FinleyJinger S Gottschall
Oct 8, 2014·Neurorehabilitation and Neural Repair·Louis N AwadDarcy S Reisman
Nov 1, 2016·Neurorehabilitation and Neural Repair·James M Finley, Amy J Bastian
Jul 28, 2017·Science Translational Medicine·Louis N AwadConor J Walsh
Jan 24, 2018·The Journal of Experimental Biology·Jaehyun BaeConor J Walsh
Jul 25, 2018·IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society·Matthew L Handford, Manoj Srinivasan
May 17, 2019·Journal of Neuroengineering and Rehabilitation·Emily M McCainGregory S Sawicki
Jun 19, 2019·Neurorehabilitation and Neural Repair·Ryan T RoemmichAmy J Bastian
Aug 5, 2020·Journal of Neuroengineering and Rehabilitation·Purnima PadmanabhanRyan T Roemmich
Aug 28, 2020·Journal of Neuroengineering and Rehabilitation·Thu M NguyenGelsy Torres-Oviedo

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.