Acute Effects of Dynamic Stretching, Plyometrics, and Loading on Achilles Tendon Properties and Performance Outcomes

Not Applicable

Completed

• Conditions: Tendon Injuries
• Interventions: Other: AAROM; Other: Slow Load; Other: Plyometric

• Registration Number: NCT05527886
• Lead Sponsor: University of South Dakota

Brief Summary

The study will be looking at acute changes in Achilles tendon properties and changes in a vertical single leg hop following an exercise intervention. The three exercise interventions will be randomized and take place on separate days 1 week apart. The three exercise interventions are AAROM, slow load, and plyometrics.

Detailed Description

The purpose of the study is to determine if there are acute changes in Achilles tendon properties and changes in performance based on what tendon exercise intervention is being used. About 70 people will take part in this research.

Study Timeline

• Study First Submitted: 2022-09-01
• Study First Submitted QC: 2022-09-01
• Study First Posted: 2022-09-06
• Study Start: 2023-01-18
• Primary Completion: 2023-10-03
• Study Completion: 2023-10-03
• Status Verified: 2023-12
• Last Update Submitted: 2023-12-04
• Last Update Posted: 2023-12-11

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 5

Inclusion Criteria

• College student

Exclusion Criteria

• Unable to complete interventions

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Group 1	Slow Load	Randomized AAROM, Slow Load, or Plyometric intervention
Group 2	Slow Load	Randomized AAROM, Slow Load, or Plyometric intervention
Group 3	AAROM	Randomized AAROM, Slow Load, or Plyometric intervention
Group 2	Plyometric	Randomized AAROM, Slow Load, or Plyometric intervention
Group 3	Plyometric	Randomized AAROM, Slow Load, or Plyometric intervention
Group 1	AAROM	Randomized AAROM, Slow Load, or Plyometric intervention
Group 1	Plyometric	Randomized AAROM, Slow Load, or Plyometric intervention
Group 3	Slow Load	Randomized AAROM, Slow Load, or Plyometric intervention
Group 2	AAROM	Randomized AAROM, Slow Load, or Plyometric intervention

Primary Outcome Measures

Name	Time	Method
Achilles Tendon Mechanical Stress Relaxation Time	immediately	A myotonometer will measure mechanical stress relaxation time in ms.
Achilles Tendon Stiffness	immediately	A myotonometer will measure the stiffness in N/m.
Achilles Tendon Logarithmic Decrement	immediately	A myotonometer will measure logarithmic decrement, which is a measure of elasticity.
Achilles Tendon Creep	immediately	A myotonometer will measure creep in De.
Achilles Tendon Natural Oscillation	immediately	A myotonometer will measure the natural oscillation frequency in Hz.

Secondary Outcome Measures

Name	Time	Method
Limb Stiffness	immediately	Limb stiffness will be measured in kN/m, generally the higher the better.
Reactive Strength Index	immediately	Reactive Strength Index will be measured as an AU, the higher the better.
Single-leg drop jump vertical	immediately	Single-leg vertical drop jump from 4-inch box with knee locked in extension will be measured in cm. A higher jump is considered better.
Flight Time	immediately	Flight time will be measured in ms, the higher the better.
Contact Time	immediately	Contact time will be measured in ms, the lower the better.

Trial Locations

Locations (1)

Sanford Coyote Sport Center; 🇺🇸 Vermillion, South Dakota, United States