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Tyler Twist — Eccentric Wrist Extension (FlexBar)

Draftstrength95%beginner⬤ strong evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
standing, holding a FlexBar with the affected wrist maximally extended and the bar twisted taut, forearm long and supported
End
wrist controlled slowly from extension into flexion as the FlexBar untwists over about three seconds, extensors lengthening under load
Range of Motion
eccentric wrist extension-to-flexion arc, ~full available wrist extension down to neutral/flexion; slow controlled untwist

How to Perform

Using a Thera-Band FlexBar, perform eccentric wrist extension for lateral epicondylalgia. The landmark Tyler et al. (2010) RCT showed DASH improved 76% vs 13% (p=0.01), VAS improved 81% vs 22% (p=0.002), and strength improved 79% vs 15% (p=0.011) over 7-8 weeks.

Watch on YouTube↗

Opens a YouTube search for “Tyler Twist — Eccentric Wrist Extension (FlexBar)”

Equipment:flexbar
Starting position: standing

Coaching Cues

  1. 1

    Long forearm — extensors lengthen against the twist

    (verbal)
  2. 2

    Slowly untwist the FlexBar over three seconds

    (verbal)
  3. 3

    Resist the unwinding force evenly throughout the range

    (verbal)
  4. 4

    FlexBar untwists like a spring slowly releasing

    (visual)

Evidence-Based Dosing & EMG Data

Recommended Dosing

3×15 reps daily, 7-8 weeks. Progress FlexBar resistance (green → blue → black) [Tyler 2010]

EMG Activation Data

Large effect sizes: pain reduction ES 1.12, function improvement ES 1.22 [Chen 2020]

Muscles Involved (2)

Primary Movers

Extensor Carpi Radialis Longus— Eccentric loading — primary target for lateral epicondylalgia

Secondary Movers

Extensor Digitorum— Common extensor origin involvement

Easier Variations ↓

1

Isometric Wrist Extension

Hold wrist in extension against light resistance. Build tolerance before eccentric work.

Harder Variations ↑

1

Heavier FlexBar

Progress from green (light) to blue (medium) to black (heavy) as pain-free.

Target Movements (1)

Wrist ExtensionRadiocarpal 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 JarTyping

Goals This Helps With

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

Tennis Elbow (Lateral Epicondylalgia)rehab⚠

Research Notes

AUDIT[medium]: Extensor carpi radialis longus is listed as the primary target for lateral epicondylalgia, but the muscle pathologically implicated in tennis elbow / lateral epicondylalgia and the principal target of eccentric FlexBar loading is extensor carpi radialis brevis (ECRB), which is not listed at all. ECRB already exists in the shard roster. → Add extensor-carpi-radialis-brevis as the primary muscle (or co-primary with ECRL) and reword the ECRL note to secondary/synergist to match the lateral-epicondylalgia rationale.

Evidence Sources (2)