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Stergiou -

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Purpose: Guideline-compliant cardiopulmonary resuscitation (CPR) performance can be achieved with training and use of real-time feedback. Kinematic differences are reported between experts and novices in various motor tasks. The aim of this pilot study was to investigate differences in kinematics between professional and lay rescuers during CPR performed on a manikin with and without feedback.

Methods: Professional (n = 5) and lay rescuers (n = 11) performed two minutes of continuous chest compressions on a manikin for two trials. Real-time CPR feedback provided by a defibrillator was disabled in the first trial and enabled in the second. CPR pads containing an accelerometer were used to calculate individual compression characteristics. Participants were instrumented for electromyography (EMG) and inertial motion capture and a motion capture marker was placed on the top hand. Paired and independent-sample t-tests and Pearson correlations were conducted in STATA 15.1.

Results: CPR feedback increased compression depth in lay rescuers (p < 0.05) to achieve guideline compliance. Lower bilateral hip range of motion (ROM) was recorded in lay rescuers compared with professionals without feedback (p < 0.05), but hip ROM was increased in lay rescuers with feedback enabled (p < 0.05). Hip ROM was associated with compression depth on both right (r = 0.61, p < 0.01) and left sides (r = 0.65, p < 0.01) for all rescuers. Greater left shoulder flexion was measured in lay rescuers both with (p < 0.05) and without feedback (p < 0.05). Lower extremity muscle coactivation indexes (CI) indicate greater hip extensor activity in professionals with feedback on both left (1.42 ± 0.17 vs. 0.87 ± 0.12, p < 0.05) and right sides (1.33 ± 0.16 vs. 0.99 ± 0.07, p < 0.05).


This is an Accepted Manuscript of an article published by Elsevier in Resuscitation on September 10, 2019, available online:

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Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

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