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.
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 Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
5
AAROM with knee to wall exercise, 3x30 reps
Single leg heel raise, 3x10 reps
Double leg 5 inch wall hops, 3x10 sec
Sanford Coyote Sport Center
Vermillion, South Dakota, United States
Achilles Tendon Stiffness
A myotonometer will measure the stiffness in N/m.
Time frame: immediately
Achilles Tendon Natural Oscillation
A myotonometer will measure the natural oscillation frequency in Hz.
Time frame: immediately
Achilles Tendon Logarithmic Decrement
A myotonometer will measure logarithmic decrement, which is a measure of elasticity.
Time frame: immediately
Achilles Tendon Mechanical Stress Relaxation Time
A myotonometer will measure mechanical stress relaxation time in ms.
Time frame: immediately
Achilles Tendon Creep
A myotonometer will measure creep in De.
Time frame: immediately
Single-leg drop jump vertical
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.
Time frame: immediately
Reactive Strength Index
Reactive Strength Index will be measured as an AU, the higher the better.
Time frame: immediately
Flight Time
Flight time will be measured in ms, the higher the better.
Time frame: immediately
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Contact Time
Contact time will be measured in ms, the lower the better.
Time frame: immediately
Limb Stiffness
Limb stiffness will be measured in kN/m, generally the higher the better.
Time frame: immediately