Impact of Fatigue on Jumping Performance

The purpose of this study will be to determine the effects of a 2-minute single limb lateral step-down fatigue test versus a 30 second side hop test on single limb forward hop distance.

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Key information

Conditions

Healthy

Age range

19 year–40 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Creighton University

Omaha, Nebraska, 68178, United States

About this study

Current methods to induce fatigue often incorporate equipment not available in all clinical settings or include tasks that are difficult to standardize. One of the tests to fatigue the leg muscles is the leg extensor fatigue test using a unilateral weight machine. There are drawbacks to this testing including the clinician having access to the equipment, testing only fatigued a single muscle group, and it is less sport/task specific compared to jump testing. Our previous work has incorporated the use of a side hop task that is performed by hopping over two lines 40 cm apart for 30 seconds. While this does induce fatigue and decreases single leg forward hop performance the overall decrease was relatively small (<10 cm). It is likely necessary to induce a greater amount of fatigue; thus further limiting single leg forward hop performance.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

No history of knee surgery
Tegner score >5

Exclusion criteria

Participants with traumatic spine or lower extremity injury within past 6 months
Participants who are unable to give consent or are unable to understand procedures of experiment

Treatment and study plan

Step-Down Test (2 min)

Other

The 2-minute single limb lateral-step down test will be used to induce lower extremity muscle fatigue. Participants will be instructed to perform a single limb lateral step-down test on a 31 cm box (12-inches), touching their heel to the floor each time as many times as possible in 2 minutes. The number of lateral step-downs will be recorded.

Side hop test (30 s)

Other

The 30 second side hop test will be used to induce lower extremity muscle fatigue. Participants will be instructed to jump as many times as possible over two parallel strips of tape placed 40 cm apart, but must initiate approximately 30 degrees of knee flexion each jump. The number of successful jumps performed within 30 seconds will be recorded and used for data analysis. An unsuccessful jump will be defined as touching the tape or the area inside the tape. We will record the number of successful trials.

Primary outcomes

Single limb hop distance (cm)

Time frame: Change from baseline single limb hop distance immediately after fatigue exercise

While standing on one leg participants will be instructed to hop as far forward as possible with a controlled single limb landing.

Sponsors and collaborators

Lead sponsor

Creighton University

Other

Registry information

Important dates

Study start: 2016
Primary completion: 2017
Study completion: 2017
First posted: Apr 28, 2017
Registry last updated: May 4, 2017

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.

Published trials that share one or more normalized conditions with this study.

Completed