📖 Static demo — read-only snapshot

You’re browsing a static build of the Body IQ knowledge graph, so everything loads with no backend. A few things that need the live server are turned off here:

  • Global search (sidebar) is disabled — it queries the API.
  • The JSON API and the API “Try it” playgroundaren’t included.
  • The data is a snapshot — it refreshes only when the demo is rebuilt, not live from the database.

Everything else — the body map, progression ladders, coverage heatmap, exercise finder, and all anatomy/exercise/source pages — works fully. The full app (live search + API + database) runs from the source on GitHub.

Thumb Opposition Sequence

Draftmotor-control80%beginner⬤ moderate evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
seated, forearm supported, hand open with fingers extended and thumb neutral
End
thumb pad rotated to face and meet each finger pad in turn (true opposition) forming a clean O, sequencing index to pinky then reversing
Range of Motion
full opposition excursion emphasizing thumb pad rotation, pad-to-pad with each finger through the sequence and back

How to Perform

Touch thumb tip sequentially to each fingertip, emphasizing rotation of the thumb pad to face the finger pad (true opposition, not just flexion).

Watch on YouTube↗

Opens a YouTube search for “Thumb Opposition Sequence”

Starting position: seated

Coaching Cues

  1. 1

    Rotated thumb pad — pad meets pad with each finger

    (verbal)
  2. 2

    Form a clean O with each finger in turn

    (verbal)
  3. 3

    Move from index to pinky, then reverse the sequence

    (verbal)
  4. 4

    Free hand on thenar eminence to confirm activation

    (tactile)

Evidence-Based Dosing & EMG Data

Recommended Dosing

10 reps × 3×/week (hand-OA protocols); daily for post-nerve injury.

EMG Activation Data

Included in multiple hand-OA and CMC-arthritis RCTs [Østerås 2017; Deveza 2021 JAMA IM; Thakker 2025 network meta-analysis].

Muscles Involved (5)

Primary Movers

Opponens Pollicis
Abductor Pollicis Brevis
Flexor Pollicis Brevis

Secondary Movers

Flexor Pollicis Longus— Extrinsic — monitor to avoid IP hyperflexion

Synergists & Assistors

Adductor PollicisSynergist

Easier Variations ↓

1

Passive Opposition

Opposite hand places thumb in opposition and holds.

2

Thumb-to-Index Only

Simplify to one opposition pair.

Harder Variations ↑

1

Pinch Small Objects

Beads, coins, buttons for pincer precision.

2

Band-Resisted Opposition

Elastic band around the thumb providing extension resistance.

Target Movements (2)

Thumb OppositionFirst Carpometacarpal Joint
Thumb AbductionFirst Carpometacarpal Joint

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 Jar