Assessment of Hip Strength, Range of Motion, EMG Activation, and Landing Mechanics in Healthy Subjects, Healthy Adult Subjects
Conditions
Keywords
Hip Bump Manipulation, Unrestrained Femoral Internal Rotation, UFIR, HVLAT
Brief summary
The purpose of this study is to objectively assess the effects of hip bump manipulation (HBM) on a healthy population aged 18-45 years. We hypothesize that the HBM will improve hip internal rotation passive range of motion, improve the strength of the hip external rotators, decrease compensatory motions in hip flexion during active range of motion, and improve bipodal landing mechanics. Human participants will be analyzed to determine whether the manipulation produces the intended clinical outcomes. While clinicians commonly use this technique, its effectiveness has yet to be substantiated through research. This technique is a high velocity low amplitude thrust to the greater trochanter which theorizes the quick stretch of the external rotator muscles and may improve a malpositioned femoral head within the acetabulum. These improvements may positively affect functional movements such as bipodal landing.
Interventions
PROCEDUREHip Bump Manipulation
This technique is a high velocity low amplitude thrust (HVLAT) directly posterior to the greater trochanter which theorizes the quick stretch of the external rotator muscles and may improve a malpositioned femoral head within the acetabulum.
PROCEDURESham (No Treatment)
Iliac Crest Sham Manipulation
Sponsors
Dominican University New York
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
SINGLE (Subject)
Intervention model description
Two-Arm Parallel Group Randomized Controlled Trial (RCT) Group A: Intervention Group B: Control (Sham)
Eligibility
Sex/Gender
ALL
Age
18 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy individuals * Aged 18-45 years old
Exclusion criteria
* Diagnosed demoroacetabular labral tear * Diagnosed osteoarthritis (OA) * Current or recent (within the past 6 months) low back pain * Hip or pelvic pain * Lower extremity injury within the past six months * Diagnosed scoliosis * History of surgery involving the femoroacetabular joint (FAJ) * Known allergic reaction to adhesive or shaving cream used for EMG placement
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Hip External Rotation Strength | From pre-intervention to post-intervention within a single session lasting approximately 20 minutes. | Measured with ActivForce Handheld Dynamometry. 3 trials for an average Mean Voluntary Isometric Contraction |
| Hip Internal Rotation Range of Motion | From pre-intervention to post-intervention within a single session lasting approximately 20 minutes. | Hip Internal rotation measured in a seat position 90/90 position. Measured with IPhone Digital Goniometry. 3 trials with a calculated average |
| Hip EMG Muscle Activation | From pre-intervention to post-intervention within a single session lasting approximately 20 minutes. | Delsys Trigno Wireless System will be used to monitor changes in muscle activation between the Tensor Fascia Latae, Gluteus Medius, and Gluteus Maximus. During seated isometric external rotation contraction and bipodal landing. EMG will be retrieved on the 2nd attempt out of 3 trials. |
| Bipodal Landing | From pre-intervention to post-intervention within a single session lasting approximately 20 minutes. | Kinvent K-Delta Force Plates used to measure changes in bipodal landing mechanics including force distribution, time to stabilization, etc. 3 trials will be conducted to present average values |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Hip Deviation with Active Assisted Hip Flexion Range of Motion | From pre-intervention to post-intervention within a single session lasting approximately 20 minutes. | Deviation resulting in excessive abduction and external rotation during knee to chest active assisted range of motion. Video recording before and after to observe changes pre and post intervention. |
| Hip External Rotation Range of Motion | From pre-intervention to post-intervention within a single session lasting approximately 20 minutes. | Measured to compare the change in External and Internal Rotation range of motion relationship. Measure with iPhone Digital Goniometry. 3 trials will be conducted to present an average value of ROM |
Countries
United States
Contacts
Primary ContactKarl Rusch, B.S., DSc, DPT
Backup ContactStephen Rodriguez, B.S., DSc, MPS PT, DPT
Outcome results
None listed