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Grip Strengthening (Squeeze Ball)

Draftstrength85%beginner⬤ moderate evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
seated, forearm supported, wrist neutral, fingers extended around a therapy ball or putty
End
full finger flexion crushing the ball into a smaller shape, then fingers spread wide on release
Range of Motion
full finger flexion to full extension; wrist held neutral

How to Perform

Squeeze a therapy ball or putty, then release. Trains finger flexion and grip strength used in all hand activities of daily living.

Watch on YouTube↗

Opens a YouTube search for “Grip Strengthening (Squeeze Ball)”

Equipment:therapy ball
Starting position: seated

Coaching Cues

  1. 1

    Long wrist, full finger flexion — flexor digitorum drives the squeeze

    (verbal)
  2. 2

    Crush the ball into a smaller shape

    (verbal)
  3. 3

    Spread the fingers wide between each squeeze

    (verbal)
  4. 4

    Free hand around the wrist — wrist stays neutral

    (tactile)

Evidence-Based Dosing & EMG Data

Recommended Dosing

3×10 reps with 3-5 second holds, 3x/week

EMG Activation Data

Hand exercises reduce short-term pain (VAS -5.0) and improve grip strength (21 lbs) in hand OA [Thakker 2025]

Muscles Involved (5)

Primary Movers

Flexor Digitorum Superficialis
Flexor Digitorum Profundus— Deep finger flexor — high activation during grip

Stabilizers

Extensor Digitorum— Maintains wrist extension during grip — stabilizer not secondary mover

Synergists & Assistors

Opponens PollicisSynergist— Thumb positioning
Lumbricals (Hand)Synergist— MCP flexion and finger positioning during grip

Easier Variations ↓

1

Softer Ball

Use a softer therapy putty or partially inflated ball to reduce resistance.

Harder Variations ↑

1

Grip Trainer

Use an adjustable grip trainer to progressively increase resistance.

2

Towel Wringing

Wring out a wet towel — combines grip with forearm rotation.

Target Movements (4)

Finger Flexion (MCP)Metacarpophalangeal Joints
Finger Extension (MCP)Metacarpophalangeal Joints
Finger Flexion (DIP)Distal Interphalangeal Joints
Finger Flexion (PIP)Proximal Interphalangeal Joints

Why This Exercise Matters

Everyday activities this exercise helps you do — essential means it directly trains the capacity the task needs:

Gripping a CupOpening a JarCarrying and Lifting ObjectsDressing — Upper BodyBathing and Personal Hygiene

Goals This Helps With

Rehab, performance, prevention, and mobility goals this exercise supports — essential means it's a cornerstone:

Improve Grip Strengthperformance

Research Notes

AUDIT[medium]: emgNotes reports pain reduction of 'VAS -5.0'; a 5-point drop on a 0-10 VAS is clinically implausible, and the identical Thakker 2025 figure is labeled 'SMD -5.0' in thumb-putty-program — the statistic type is mislabeled here. → Relabel as SMD (matching thumb-putty-program) and verify the magnitude against the source; do not present it as a raw VAS change.

Evidence Sources (7)