RSM-DPA-S001
Written by Hironori Ikeda, MSc Sports Medicine
RSM International Academy · Chiang Mai, Thailand
Dynamic Posture Assessment clinical guides → Hip Drops on One Leg: Gluteal Capacity & Trunk Strategy
An unstable surface changes the task. More movement on a balance device should not automatically be labelled poor posture, weak gluteals or a broken kinetic chain.
In This Article
- In This Article
- 1. Choosing a Balance Task for the Assessment Goal
- Establish a Stable Baseline
- Add Instability for a Specific Reason
- Keep Transfer Separate From Performance on the Device
- 2. Hip Support and Trunk Lean Are Separate Observations
- 3. Re-Test on the Original Surface and Support
- Related RSM Clinical Blogs
- Study Dynamic Posture Assessment at RSM
1. Choosing a Balance Task for the Assessment Goal
Establish a Stable Baseline
Choose a manageable standing or single-leg task on firm ground. Record footwear, support, duration and the person’s confidence. Observe trunk and pelvic movement without assuming that a visible hip drop measures one muscle’s strength.
Add Instability for a Specific Reason
Use an unstable device only when it fits the person’s ability and training goal, with safe support available. Ask one question, such as whether controlled weight transfer remains comfortable. Do not simultaneously remove hand support, add external load and lengthen the trial.
Balance practice and strength training are different demands. A more difficult balance task is not necessarily a better way to develop force or prepare for every sport. A device-based observation should be checked against the person’s actual task on the relevant surface.
Keep Transfer Separate From Performance on the Device
If balance improves on a ball, record that result. Then repeat the stable task under its original conditions. Do not claim improved sport performance or pain reduction unless those outcomes were actually assessed over an appropriate period.
2. Hip Support and Trunk Lean Are Separate Observations
In single-leg support, gluteus medius contributes to controlling hip adduction and the pelvis, while trunk lean changes the external demand. Observe the pelvis and trunk separately on a stable floor before adding instability. Pelvic drop alone does not quantify gluteal strength.
3. Re-Test on the Original Surface and Support
A wobbling surface asks a new coordination question. Document hand support, footwear and trial duration; a different score on a different surface is not deterioration or recovery in the same test.
Related RSM Clinical Blogs
▷ Hip Drops on One Leg: Gluteal Capacity & Trunk Strategy — Dynamic Posture Assessment · Explore the full symptom assessment and treatment decisions.
▷ Hip Drop on One Leg: Gluteals, QL & Pelvic Control — Deep Tissue Massage · Compare a related clinical question from another assessment angle.
▷ Glute Tightness After Training: Hip Rotation & Single-Leg Control — Sports Massage · Connect the contact finding with movement and load.
Study Dynamic Posture Assessment at RSM
Develop the anatomical comparison, contact control and re-assessment skills behind this note. View Dynamic Posture Assessment course details. Explore the clinical guide. Check the official course schedule.
For the landmark and clinical palpation foundation, explore the Trigger Point Therapy course.
About the Author
Hironori Ikeda, MSc Sports Medicine is the lead instructor at RSM International Academy. His teaching connects functional anatomy, clinical palpation, treatment decisions and re-assessment.