Dynamic stability with an earthquake elastic band is a shoulder exercise in which an elastic band is used to create unstable and vibrating resistance. This instability requires the muscles around the shoulder joint to continuously make small corrections to keep the arm and joint stable.
The exercise mainly focuses on the cooperation between the rotator cuff, shoulder blade muscles and the muscles of the upper arm. The unstable load greatly stimulates neuromuscular control of the shoulder.
Aimed at improving dynamic shoulder stability and neuromuscular control. Strengthens the rotator cuff and scapular stabilisers. Supports a stable shoulder during movements requiring quick corrections.
Dynaband/elastic
Fixed anchor point or training partner
Flat surface
Attach the elastic to a fixed point
Stand upright with feet hip-width apart
Hold the elastic band with one hand
Elbow slightly bent or in 90-degree position
Shoulder stable and low
Core slightly tightened
Look ahead
Keep the arm stable against the resistance of the elastic band
Make the rubber band make small vibrating movements
Stabilise the arm through minor corrections
Keep the shoulder stable and controlled
Move calmly and in a controlled manner
Change of arm after completion
✓ Keep the shoulder stable
✓ Core slightly tightened
✓ Move in a controlled manner despite instability
✓ Shoulders low and relaxed
✓ Move within a pain-free range
✗ Shoulders raised towards ears
✗ Using elastic too heavy
✗ Compensation from the trunk
✗ Making moves that are too big
✗ Ignoring pain in shoulder
Dynamic stability with earthquake elastic band is used to improve stability and control of the shoulder joint in cases of unstable load. The exercise is especially suitable in later stages of shoulder rehabilitation, when basic stability is already sufficiently present.
In addition, this exercise can be used preventively in athletes who want to improve their shoulder control, for example when performing overhead or explosive movements. Due to the unstable resistance, the cooperation between different shoulder muscles is additionally stimulated. Application, loading and progression should always take place in consultation with a physiotherapist or other qualified professional, to ensure that the exercise is safe and tailored to individual load capacity, complaints and recovery status.
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