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Updated: Jul 7, 2026
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Kinematic Analysis Using 3D Motion Capture of Drinking Task in People With and Without Upper-extremity Impairments
Published on: March 28, 2018
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A cup half full: exploring the kinematic consequences of variations in the drinking task protocol.
Justin Huber1, Stacey M Slone2, Ann Stowe3
1Department of Physical Medicine and Rehabilitation, University of Kentucky, Lexington, USA. justin.huber@uky.edu.
Journal of Rehabilitation Medicine
|October 22, 2025
Summary
Protocol variations in the drinking task significantly impact upper limb kinematic metrics, affecting movement time and trunk displacement. Standardizing the drinking task protocol is crucial for reliable upper limb kinematic assessment in neurorehabilitation research.
Area of Science:
- Neuroscience
- Rehabilitation Research
- Biomechanics
Background:
- Kinematic assessment of the drinking task provides objective measures for upper limb recovery after neurological injury.
- Standardization efforts are underway due to increased interest in the rehabilitation research community.
- Protocol fidelity is essential for the reliability of drinking task kinematic assessments.
Purpose of the Study:
- To investigate the impact of drinking task protocol variations on kinematic metrics.
- To determine if differences in seating position, cup start position, and target definition affect kinematic outcomes.
- To inform standardization efforts for upper limb kinematic assessment in stroke rehabilitation.
Main Methods:
- Employed an incomplete block design with repeated measures.
- Recruited six neurotypical participants.
- Varied seating position, cup start position, and target definition; analyzed data using mixed-effects linear models.
Main Results:
- All tested factors significantly impacted at least one kinematic metric.
- Seating position affected movement time and trunk displacement.
- Cup start position influenced trunk displacement, and target definition impacted movement time.
Conclusions:
- Variations in the drinking task protocol significantly influence kinematic metrics.
- Standardization of the drinking task protocol is recommended to reduce between-study variability.
- Adherence to a standardized protocol will enhance the adoption of kinematic assessment in rehabilitation research.
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