Data for: Modulation of joint and limb mechanical work in walk-to-run transition steps in humans

Paper Abstract: Surprisingly little information exists of the mechanics in the steps initializing the walk-to-run transition (WRT) in humans. Here we assess how mechanical work of the limbs (vertical and horizontal) and the individual joints (ankle, knee and hip) are modulated as humans transition from a preferred constant walking velocity (WLK) to a variety of running velocities (RUN; ranging from a sprint to a velocity slower than WLK). WRTs to fast RUNs occur nearly exclusively through positive horizontal limb work, satisfying the goal of forward acceleration. Contrary to our hypothesis, however, positive mechanical work remains above that of WLK even when decelerating. In these WRTs to slow running, positive mechanical work is remarkably high and is comprised nearly exclusively of vertical limb work. Vertical-to-horizontal work modulation may represent an optimization for achieving minimal and maximal RUN velocity, respectively, while fulfilling an apparent necessity for energy input when initiating WRTs. Net work of the WRT steps was more evenly distributed across the ankle, knee and hip joints than expected. Absolute positive mechanical work exhibited a clearer modulation towards hip-based work at high accelerations (> 3 m s−2), corroborating previous suggestions that the most proximal joints are preferentially recruited for locomotor tasks requiring high power and work production. In WRTs to very slow RUNs, high positive work is nevertheless done at the knee, indicating that modulation of joint work is not only dependent on the amount of work required but also the locomotor context.

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Work Title Data for: Modulation of joint and limb mechanical work in walk-to-run transition steps in humans
Access
Open Access
Creators
  1. Jonas Rubenson
  2. Neville Pires
  3. Brendan Lay
Keyword
  1. biomechanics
  2. joint work
  3. running
  4. gait transition
  5. walking
License Attribution 4.0 International (CC BY 4.0)
Work Type Dataset
DOI doi:10.18113/S1N06P
Related URLs
Deposited August 04, 2018

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Version 1
published

  • Created
  • Added ReadMe.txt
  • Added Fig_5_Limb_Work_vs_Accel.xlsx
  • Added Fig_4_Joint_Power_Examples.xlsx
  • Added Data_Explanation.txt
  • Added Fig_2_GRF_vs_Marker_Accel_and_Work.xlsx
  • Added Pires_et_al.png
  • Added Fig_6_and_7_Joint_Work_vs_Accel.xlsx
  • Added Fig_9_Delta_Walk.xlsx
  • Added Fig_3_Box_and_Whisker_Plots.xlsx
  • Added Creator Jonas Rubenson
  • Added Creator Neville Pires
  • Added Creator Brendan Lay
  • Published