Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Energetic costs of incidental visual coupling during treadmill running.
AU - Eaves, Daniel
AU - Hodges, Nicola
AU - Williams, A. Mark
PY - 2008/8
Y1 - 2008/8
N2 - Purpose: To determine the role of visual-spatial information in stabilizing movement during treadmill locomotion. Methods: Physiological, biomechanical, and psychological indices of coordination stability were recorded while participants were visually coupled with a whole-body image of themselves during treadmill locomotion. Ten participants ran on a treadmill under three visual conditions: two dynamic images (symmetrical, mirror image; asymmetrical, reversed mirror image) and one static. Performance was examined at two speeds. Results: Participants ran more economically (mL·kg·min -1) when they were visually coupled with a symmetrical rather than with an asymmetrical or static image. An asymmetrical coupling resulted in increased variability in footfall position at the faster speed, in comparison to the symmetrical and static conditions. However, at slower speeds, footfall variability and frequency were higher under both dynamic visual conditions in comparison to the static control. Changes in metabolic economy (mL·kg·min-1) were only partially mediated by movement kinematics. Conclusion: Visual information influences treadmill locomotion and associated measures of stability even when there is no intention to coordinate with external stimuli.
AB - Purpose: To determine the role of visual-spatial information in stabilizing movement during treadmill locomotion. Methods: Physiological, biomechanical, and psychological indices of coordination stability were recorded while participants were visually coupled with a whole-body image of themselves during treadmill locomotion. Ten participants ran on a treadmill under three visual conditions: two dynamic images (symmetrical, mirror image; asymmetrical, reversed mirror image) and one static. Performance was examined at two speeds. Results: Participants ran more economically (mL·kg·min -1) when they were visually coupled with a symmetrical rather than with an asymmetrical or static image. An asymmetrical coupling resulted in increased variability in footfall position at the faster speed, in comparison to the symmetrical and static conditions. However, at slower speeds, footfall variability and frequency were higher under both dynamic visual conditions in comparison to the static control. Changes in metabolic economy (mL·kg·min-1) were only partially mediated by movement kinematics. Conclusion: Visual information influences treadmill locomotion and associated measures of stability even when there is no intention to coordinate with external stimuli.
U2 - 10.1249/MSS.0b013e31817057a8
DO - 10.1249/MSS.0b013e31817057a8
M3 - Journal article
VL - 40
SP - 1506
EP - 1514
JO - Medicine and Science in Sports and Exercise
JF - Medicine and Science in Sports and Exercise
IS - 8
ER -