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Completed

NCT Number: NCT04502615

Effect of Sand on Knee Load and Muscle Activity During a Single Leg Landing Task

This study evaluates the effect of different surfaces on the load experienced by the knee when landing from a single leg hop. A sand, pliable grass and firm (hard floor) surface will be compared when hopping from a 30 cm height. Each subject will complete 5 hops on each surface in a random order. The muscle activity in selected muscles of the lower limb will also be investigated to see how this differs in the landing leg, when landing on the different surfaces.

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Key information

Conditions

Single Leg Hop Sand Surface Single Leg Hop Firm Surface Single Leg Hop Grass Surface

Age range

16 year–45 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Teesside University

Middlesbrough, TS1 3BA, United Kingdom

About this study

The aim of this study is twofold: 1) To investigate the effect of sand on landing kinematics and kinetics at the knee joint when performing a single leg jump landing task (dominant leg), comparing sand with a firm surface and pliable grass control. 2) To investigate the sEMG activity of the hamstring, quadriceps and gastrocnemius muscles of the dominant leg during the jump landing task on these different surfaces (from take off through to terminal knee flexion at the end of the landing phase).

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Female
  • Participate in a minimum of 3 hours sporting activity per week.
  • Provided Informed Consent
  • Must be over 16 years of age (16-45 years)
  • No exclusion criteria

Exclusion criteria

  • Not willing to provide informed consent
  • Pregnant
  • History of ACL injury or other knee pathology
  • Significant lower limb pathology
  • Previous lower limb fracture or surgery
  • Lower Limb injury in last 3 months.
  • Male

Treatment and study plan

Sand

Other

sand surface

artificial grass

Other

grass surface

firm ground

Other

firm surface

Primary outcomes

  1. knee abduction moment (N.m)

    Time frame: 1 testing session (1 day)

    a combination of ground force and amount of knee valgus on landing

  2. knee valgus

    Time frame: 1 testing session (1 day)

    angle at the knee on landing

  3. surface electromyography (sEMG) activity pre and post landing

    Time frame: 1 testing session (1 day)

    muscle activity of quadriceps (vastus medialis, vastus lateralis), hamstrings (lateral and medial), gastroc (lateral head)

Secondary outcomes

  1. Anterior tibial translation

    Time frame: 1 testing session(1 day)

    The amount of forward translation of the tibia when landing on the surface

Sponsors and collaborators

Lead sponsor

Teesside University

Other

Registry information

Official study title

Effect of Sand on Knee Load and sEMG Activity During a Single Leg Landing Task: Implications for ACL Prevention and Rehabilitation

Important dates

Study start
2020
Primary completion
2021
Study completion
2021
First posted
Aug 6, 2020
Registry last updated
Apr 27, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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