Evaluation of Trunk Assistance Exoskeleton
Choosing a Trunk Assistance Exoskeleton: Issues of Cumulative Lumbar Loading, Muscle Fatigue, and Discomfort During Repetitive Lifting Tasks
TOPMED
20 participants
Jun 4, 2025
INTERVENTIONAL
Conditions
Summary
The goal of this interventional study is to evaluate the effect of three different designs of trunk assistance exoskeletons on cumulative lumbar load, trunk extensors' muscular fatigue and comfort in healthy volunteers. The main questions it aims to answer is: will exoskeletons reduce muscle fatigue and cumulative lumbar load. Participants will : * get each exoskeletons adjusted and then practice the lifting task and measurement sequence in a first session * perform a lifting task for 4 blocks of 20 minutes on different sessions for each exoskeleton, another session is performed without assistance.
Eligibility
Inclusion Criteria1
- Being able to communicate in french
Exclusion Criteria11
- Back pain in the last year
- Back pain for more than a week in the years prior
- Musculoskeletal injury in the last year
- Trunk musculoskeletal system surgery in the last year
- Scoliosis diagnostic
- Systemic illness, degenerative disease or syndrome related to the trunk musculoskeletal or nervous system
- Body mass index over 35 kg/m\^2
- History of neurological damage
- Any contraindication to the practice of physical activity
- Incapacity to perform the lifting task at the specified rythm
- Medication with a negative impact on balance
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Interventions
During the adjustment and practice session, participants will perform the lifting task with each exoskeleton after they are properly fitted. They will also perform the measurement sequence as to limit learning effects during lifting task sessions. The lifting task is a box transfer tasks from the ground to a table adjusted at the participant's hip height. The task rhythm is 7 cycles per minute. The box weight is equivalent to 10% of their maximal lifting strength. Total session duration is about 3 hours.
This lifting task session is performed without any trunk assistance exoskeleton. Participants perform 3 blocks of 20 minutes of the lifting task. The lifting task is a box transfer tasks from the ground to a table adjusted at the participant's hip height. The task rhythm is 7 cycles per minute. The box weight is equivalent to 10% of their maximal lifting strength. Total session duration is about 3 hours.
This lifting task session is performed with the Mawashi Uplift Lite trunk assistance exoskeleton. Participants will perform 3 blocks of 20 minutes of the lifting task. The lifting task is a box transfer tasks from the ground to a table adjusted at the participant's hip height. The task rhythm is 7 cycles per minute. The box weight is equivalent to 10% of their maximal lifting strength. Total session duration is about 3 hours.
This lifting task session is performed with the Biolift trunk assistance exoskeleton. Participants perform 3 blocks of 20 minutes of the lifting task. The lifting task is a box transfer tasks from the ground to a table adjusted at the participant's hip height. The task rhythm is 7 cycles per minute. The box weight is equivalent to 10% of their maximal lifting strength. Total session duration is about 3 hours.
This lifting task session is performed with the Leavo Flex trunk assistance exoskeleton. Participants perform 3 blocks of 20 minutes of the lifting task. The lifting task is a box transfer tasks from the ground to a table adjusted at the participant's hip height. The task rhythm is 7 cycles per minute. The box weight is equivalent to 10% of their maximal lifting strength. Total session duration is about 3 hours.
Locations(1)
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NCT07084974