Mental Fatigue and Industrial Work Performance
1 other identifier
interventional
12
1 country
1
Brief Summary
To investigate the effect of mental fatigue on industrial work performance, biomechanical determinants, (electro-)(psycho-) physiological measures and physical ergonomics. Additionally, the current project wants to evaluate whether or not the Laevo exoskeleton influences the aforementioned parameters when mental fatigue is acutely induced.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for not_applicable healthy
Started Mar 2021
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
September 22, 2020
CompletedFirst Posted
Study publicly available on registry
January 22, 2021
CompletedStudy Start
First participant enrolled
March 8, 2021
CompletedPrimary Completion
Last participant's last visit for primary outcome
August 14, 2021
CompletedStudy Completion
Last participant's last visit for all outcomes
August 14, 2021
CompletedOctober 22, 2021
October 1, 2021
5 months
September 22, 2020
October 19, 2021
Conditions
Outcome Measures
Primary Outcomes (6)
VICON: Placement accuracy Box
Accuracy of placement box during the dual-task will be measured with VICON. VICON-markers will be placed on the box to track its movement during the trial. First, the optimal position of the box for each level (ground or shoulder) will be determined, these will form the reference frames. Next, the accuracy of each relocation will be determined by the offset compared to these reference frames. This will be calculated into a percentage.
30 minutes
Work performance: Percent accuracy Serial Seven Task
An audio record of this task will be made to verify made errors posthoc. During the serial seven task participants are given a number between 900 and 950. The given starting number will change each trial. Participants are asked to subsequently subtract seven as fast as possible.The researcher will take note of every answer. If the participant makes an error, he/she may continue to calculate with the wrong number. The ratio of correct answers to the total number of responses will indicate the percent accuracy for each participant.
30 minutes
Ergonomics: EMG-data
Muscle activity during the performance of the industrial task of the erector spinae muscle, m. rectus abdominus, both m. obliqui abdominus, all three parts of m. trapezius, all three of m. deltoideus, m. pectoralis major, m. latissimus dorsi, m. biceps brachii, m. triceps brachii,m. flexor- and extensor carpi radials, m. flexor- and extensor carpi ulnaris, m. flexor- and extensor digitorum, m. gluteus maximus and medius, m. rectus femoris, m. biceps femoris. ; measured with Cometa mini wave.
30 minutes
Ergonomics: Joint angles
Joint angles will be measured during the performance of the industrial task to evaluate movement variability. 30 VICON markers will be placed bilateral on the body of the participant on anatomical landmarks.
30 minutes
Mental fatigue: EEG-data
Alpha, Beta and Theta activity in the electroencephalogram measured with open bci (OpenBci, inc)
60 minutes
Mental fatigue: VAS-score
Participants are asked to indicate their subjective feeling on a straight line ranging from "not at all mentally fatigued" to "extreme mentally fatigued"
60 minutes
Study Arms (4)
Mental fatigue - No Robot
EXPERIMENTALDuring a 15 minute trial, the participant will relocate a box of 5 kilograms between ground level and shoulder height. During this task, the participants are asked to perform the serial seven task, continuously subtracting seven from a given number between 900 and 950. Afterwards, the participant will perform a 60- minute Stroop task and is asked to repeat this abovementioned physical dual-task.
Mental fatigue - Exoskeleton
EXPERIMENTALDuring a 15 minute trial, the participant will wear the Laevo exoskeleton and will relocate a box of 5 kilograms between ground level and shoulder height. During this task, the participants are asked to perform the serial seven task, continuously subtracting seven from a given number between 900 and 950. Afterwards, the participant will perform a 60- minute Stroop task and is asked to repeat this abovementioned physical dual-task.
No Mental fatigue - No Robot
PLACEBO COMPARATORDuring a 15 minute trial, the participant will relocate a box of 5 kilograms between ground level and shoulder height. During this task, the participants are asked to perform the serial seven task, continuously subtracting seven from a given number between 900 and 950. Afterwards, the participant will watch a 60- minute neutral documentary and is asked to repeat this abovementioned physical dual-task.
No Mental fatigue - Exoskeleton
PLACEBO COMPARATORDuring a 15 minute trial, the participant will wear the Laevo exoskeleton and will relocate a box of 5 kilograms between ground level and shoulder height. During this task, the participants are asked to perform the serial seven task, continuously subtracting seven from a given number between 900 and 950. Afterwards, the participant will watch a 60- minute neutral documentary and is asked to repeat this abovementioned physical dual-task.
Interventions
A modified Stroop task of approximately 60 min will be used in order to induce mental fatigue (MF). This will be based on their performance during the max test that was conducted during the familiarization session. In this task, which will be partitioned in 4 blocks of 468 stimuli, four colored words ("rood", "blauw", "groen" and "geel") will be presented one at a time on a computer screen. The participants will be required to indicate the color of the word, ignoring the meaning of the word itself.
In the control task subjects will have to watch a documentary of 60 min on the same computer screen as the one used for the experimental trial. In order to avoid under- and over-arousal the subjects will have the opportunity to choose between several documentaries as proposed by the research team.
Eligibility Criteria
You may qualify if:
- Healthy
- Males and Females
- years
You may not qualify if:
- Musculoskeletal disorders
- Neurological disorders
- Cardiovascular disorders
- Pregnancy
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Vrije Universiteit Brussel
Etterbeek, Brussels Capital, 1050, Belgium
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Intervention Hierarchy (Ancestors)
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- PREVENTION
- Intervention Model
- CROSSOVER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Prof. Dr.
Study Record Dates
First Submitted
September 22, 2020
First Posted
January 22, 2021
Study Start
March 8, 2021
Primary Completion
August 14, 2021
Study Completion
August 14, 2021
Last Updated
October 22, 2021
Record last verified: 2021-10
Data Sharing
- IPD Sharing
- Will not share