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Differences and Changes in Lower Limb Muscle Activation and Ankle Stability in Different Blackboard Configurations

NCT06425185 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 30

Last updated 2024-06-03

No results posted yet for this study

Summary

The goal of this observational study is to analyze the differences in muscle activation of six muscles of the lower leg (soleus, gastrocnemius medialis, gastrocnemius lateralis, tibialis anterior, peroneus longus, peroneus brevis) in seven possible configurations of a specific instability device, the Blackboard (BB), as well as on the floor, among healthy active subjects.

The main questions it aims to answer are:

1. Which configuration of the BB produces the highest activation for each studied muscle?
2. Which muscle is the most activated in each configuration of the BB?
3. What is the muscle activation pattern obtained in each configuration of the BB?

A single group of participants will be analyzed. Both the studied leg and the order of configurations of the instability device and ground condition will be randomly assigned. Participants will first undergo a 2-minute continuous walking warm-up, followed by a performance of a maximum voluntary isometric contraction (MVIC) for each muscle, during which the maximum activation produced will be recorded. Each participant will be allowed a 30-second familiarization period on the most unstable configuration of the BB. Three repetitions of 20 seconds will be recorded on both the ground and each configuration, with a 30-second rest between repetitions. The central 10 seconds of each trial will be used for subsequent analysis. The mean of the three repetitions for each muscle will be calculated and subsequently processed and normalized by the maximum activation value during the MIVC.

Finally, a statistical analysis of the differences in muscle activation in each configuration will be conducted with the intention of addressing the mentioned questions.

Conditions

  • Electromyography

Interventions

OTHER

Single-leg stance under different instability conditions

Participants will perform three attempts of 20 seconds of single-leg stance on the floor and on the 7 selected configurations of the BB. The order of measurement will be randomized. The description of the chosen configurations can be found in the Detailed Description section. In all cases, the participant's objective is to ensure that the edges of the BB are not in contact with the floor. The position of the participant on the BB will be a single-leg stance on the randomly chosen foot, with the contralateral knee slightly flexed and hands placed on the hips. Participants will look at a fixed point placed 3 meters in front of them. A rest period of 30 seconds will be allowed between trials. The physiotherapist responsible for supervising the measurements will be the one to adjust the BB configurations when needed.

Sponsors & Collaborators

  • University of Valencia

    lead OTHER

Principal Investigators

  • Rodrigo Martín-San Agustín, Doctor · University of Valencia

Eligibility

Min Age
18 Years
Max Age
30 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-04-09
Primary Completion
2024-05-31
Completion
2024-05-31

Countries

  • Spain

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06425185 on ClinicalTrials.gov