Locomotion Strategies of Low Back Pain Patients in a Dynamic Environment

Recruiting

• Conditions: Walking; Chronic Low-back Pain
• Interventions: Behavioral: Quantified analysis of walking during a crossing task between two walkers

• Registration Number: NCT05851118
• Lead Sponsor: University of Rennes 2

Brief Summary

The biomechanical parameters studied in non-specific chronic low back pain patients in a locomotion task have so far focused on straight line walking. Although locomotion is primarily an automated action composed of repetitive patterns allowing movement from one place to another, walkers must respond to the environmental demands.These modifications show a flexible and adaptive approach to the constraints of the environment. In this study, the investigators are particularly interested in a task of crossing between two pedestrians, which is a standardised task that has shown its interest in the study of perceptual-motor co-ordination. In particular, it allows to study the mutual adaptation of speed and orientation between the two walkers.

Detailed Description

Not available

Study Timeline

• Study Start: 2023-03-01
• Study First Submitted: 2023-04-28
• Study First Submitted QC: 2023-04-28
• Status Verified: 2023-05
• Study First Posted: 2023-05-09
• Last Update Submitted: 2023-05-09
• Last Update Posted: 2023-05-11
• Primary Completion: 2024-05-01
• Study Completion: 2024-05-01

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 36

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Control group	Quantified analysis of walking during a crossing task between two walkers	Participant with no current or past chronic pain
Non-Specific Low Back Pain patients	Quantified analysis of walking during a crossing task between two walkers	Participants must have pain located between the thoracolumbar hinge and the lower gluteal fold, with or without pain in either leg, present for more than 12 weeks, on a daily or almost daily basis (at least 4 days out of 7).

Primary Outcome Measures

Name	Time	Method
Threshold for motion adaptation	Clinical assessment at base line	Thresholds of adaptation to movement will be identified by comparing the minimum crossing distance and the minimum predicted distance of crossing at the time the walkers first see each other.

Secondary Outcome Measures

Name	Time	Method
Contribution to collision avoidance	Clinical assessment at base line	During the interaction period, a cumulative contribution must be made by both walkers to avoid a collision. Analysis of the contribution of each walker (speed and orientation).
Walking speed	Clinical assessment at base line	Analysis of the walking speed of each walker for the control tests, i.e. where the walker has not encountered another walker.
Inversion of crossing order	Clinical assessment at base line	mpd(t) was assigned according to the final crossing order between two walkers in such a way that allowed for a positive mpd (tcross). In doing so, a positive mpd(tsee) suggests that crossing order was preserved along the entire interaction. Alternatively, a negative mpd (tsee) is the result of an inversion in crossing order between the two walkers.
Minimum Predicted Distance	Clinical assessment at base line	Minimum Predicted Distance (mpd) represents the theoretical crossing distance between the future positions of the participants, based on a linear extrapolation of their trajectory given their current position and speed at time (t). Any variation in mpd(t) indicates that a movement adaptation to avoid a collision has taken place between two walkers.

Trial Locations

Locations (1)

University of Rennes 2; 🇫🇷 Rennes, France