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.

Study Overview

• Status: Completed
• Conditions: Healthy
• Intervention / Treatment: Other: Step-Down Test (2 min); Other: Side hop test (30 s)

Detailed Description

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.

• Study Type: Interventional
• Enrollment (Actual): 20
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Nebraska
    • Omaha, Nebraska, United States, 68178
      • Creighton University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 15 years to 36 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Exercise: step-down test (2 min); 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.	Other: Step-Down Test (2 min); 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.
Experimental: Exercise: side hop test (30 s); 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.	Other: Side hop test (30 s); 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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Single limb hop distance (cm)	While standing on one leg participants will be instructed to hop as far forward as possible with a controlled single limb landing.	Change from baseline single limb hop distance immediately after fatigue exercise

Collaborators and Investigators

• Sponsor: Creighton University

Study record dates

Study Major Dates

• Study Start: November 1, 2016
• Primary Completion (Actual): April 1, 2017
• Study Completion (Actual): April 1, 2017

Study Registration Dates

• First Submitted: November 17, 2016
• First Submitted That Met QC Criteria: April 25, 2017
• First Posted (Actual): April 28, 2017

Study Record Updates

• Last Update Posted (Actual): May 4, 2017
• Last Update Submitted That Met QC Criteria: May 3, 2017
• Last Verified: May 1, 2017

More Information

Terms related to this study

• Keywords: Step test; Vertical Jump; Side Hop; Forward Hop
• Additional Relevant MeSH Terms: Fatigue
• Other Study ID Numbers: 959318

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No