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Fatigue Effect on Minimal Toe Clearance and Toe Activity during Walking.

Yingjie Jin1, Yui Sano1, Miho Shogenji2

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Fatigue significantly impacts walking in young adults, altering forefoot activity (FA) and minimum toe clearance (MTC). These changes, measured by a novel sensor system, varied individually but were notable in the dominant foot.

Keywords:
fatigueforefoot activitygaitminimal toe clearance

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Area of Science:

  • Biomechanics
  • Human movement analysis
  • Wearable sensor technology

Background:

  • Fatigue is known to affect motor control and gait.
  • Understanding gait alterations due to fatigue is crucial for injury prevention and performance optimization.
  • Existing methods for measuring gait parameters like forefoot activity and toe clearance can be cumbersome.

Purpose of the Study:

  • To investigate the effects of induced fatigue on forefoot activity (FA) and minimum toe clearance (MTC) during walking in young adults.
  • To evaluate the efficacy of a novel clog-integrated sensor system for simultaneously measuring FA and MTC.
  • To analyze individual variations in gait responses to fatigue.

Main Methods:

  • Development of a clog-integrated sensor system measuring FA (via camera and light conductive plate) and MTC (via time of flight sensor).
  • Clog posture data collected using an acceleration sensor.
  • Fatigue was induced by having 14 participants walk on a treadmill at their fastest speed.
  • FA and MTC were measured before and after fatigue induction in both feet.

Main Results:

  • Fatigue induced observable changes in either FA or MTC in at least one foot for all participants, though effects varied individually.
  • A significant increase in either FA or MTC was observed in the dominant foot of 13 out of 14 participants.
  • As a group, the mean MTC in the dominant foot showed a significant increase (p = 0.038) post-fatigue.

Conclusions:

  • The developed clog-integrated sensor system effectively captures gait parameters affected by fatigue.
  • Fatigue demonstrably alters gait dynamics, specifically affecting forefoot activity and minimum toe clearance in young adults.
  • Individual variability exists in the manifestation of fatigue-induced gait changes, with a notable impact on the dominant foot.