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

Teesside University

Status: Completed

Conditions: Single Leg Hop Firm Surface; Single Leg Hop Grass Surface; Single Leg Hop Sand Surface

Treatments: Other: Sand; Other: artificial grass; Other: firm ground

Study type: Interventional

Funder types: Other

Identifiers

NCT04502615

TeessideUni

Details and patient eligibility

About

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.

Full description

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).

Enrollment: 20 patients

Sex: Female

Ages: 16 to 45 years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: None (Open label)

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20 participants in 3 patient groups

Sand

Experimental group

Description:

Participants perform 5 single leg hops onto a Sand surface from a 30cm height

Treatment:

Other: Sand

Artificial grass

Active Comparator group

Description:

Participants perform 5 single leg hops onto a grass surface from a 30cm height

Treatment:

Other: artificial grass

Firm Ground

Active Comparator group

Description:

Participants perform 5 single leg hops onto a firm ground surface from a 30cm height

Treatment:

Other: firm ground