Impact of Fatigue on Jumping Performance

NCT ID: NCT03133078

Last Updated: 2017-05-04

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-11-30
• Study Completion Date: 2017-04-30

Brief Summary

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.

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.

Conditions

Healthy

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

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.

Group Type: EXPERIMENTAL

Step-Down Test (2 min)

Intervention Type: 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.

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.

Group Type: EXPERIMENTAL

Side hop test (30 s)

Intervention Type: 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.

Interventions

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.

Intervention Type: 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.

Intervention Type: OTHER

Eligibility Criteria

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

• Minimum Eligible Age: 19 Years
• Maximum Eligible Age: 40 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Creighton University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Terry L Grindstaff, PhD, PT, ATC

Role: PRINCIPAL_INVESTIGATOR

Creighton University

Locations

Creighton University

Omaha, Nebraska, United States

Countries

United States

Other Identifiers

959318

Identifier Type: -

Identifier Source: org_study_id