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Ruben Luijkx, Master of Science and co-owner of Fysio Fitaal, specialises in sports-related complaints, ultrasound diagnostics and manual therapy. Writing on physiofitaal.nl, he introduces you to the expertise and professionalism of Fysio Fitaal in Tilburg.
Dynamic stability elastic co contractions 90
Dynamic stability shoulder with elastic band co-contractions in 90-degree position is an exercise in which the shoulder is held in 90-degree abduction while light, controlled resistance is applied from different directions. The exercise stimulates simultaneous activation (co-contraction) of the rotator cuff and shoulder blade muscles. The emphasis is on stability, responsiveness and controlled muscle activation around the shoulder joint.
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Purpose of the exercise
Aims to improve dynamic shoulder stability, neuromuscular control and coordination of the rotator cuff in a functional overhand position. Improves load capacity in sports movements such as throwing, hitting and overhead lifting. Supports injury prevention and return-to-sport trajectories.
Supplies
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Elastic/dynaband
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Fixed anchor point or external resistance partner
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Flat surface
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Possibly mirror for posture control
Starting position
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Stand upright with feet hip-width apart
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Place the shoulder in 90-degree abduction
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Elbow bent at 90 degrees
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Forearm positioned vertically
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Core tightened
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Shoulder blade stable and low
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Elastic attached in desired resistance direction
Implementation
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Keep the arm stable in the 90° position
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Apply slight tension to the elastic band
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Allow small, controlled pulling forces to occur
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Resist movement without moving the arm
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Activate both internal and external rotators
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Keep torso and shoulder blade stable
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Maintain controlled breathing
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Change direction or side if necessary
Points of interest
✓ Keep the arm stable in 90° abduction
✓ Activate scapula and rotator cuff muscles simultaneously
✓ Core tightened for torso stability
✓ Use light, controllable resistance
✓ Move within a pain-free range
✗ Lower arm or drop forward
✗ Shoulders raised towards ears
✗ Excessive trunk rotation
✗ Using too heavy resistance
✗ Ignoring pain in shoulder or neck
When this exercise?
Dynamic stability elastic co-contractions 90° is used to improve shoulder stability and neuromuscular control in a functional overhand position. The exercise is particularly relevant within rehabilitation for shoulder problems, especially in later stages where stability is trained under varying loads.
In addition, this exercise is valuable for athletes who do a lot of throwing, hitting or overhead movements and want to keep their shoulder taxable. Due to the well-dosed elastic resistance, the exercise is applicable in different phases of training and recovery. 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, symptoms and recovery status.
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