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Chin-Up

Draftstrength50%intermediate⬤ limited evidence
View FHIR resourceFHIR R4 ActivityDefinition — the interoperable form of this exercise

Positions & Range of Motion

Start
full dead hang from an overhead bar, supinated (palms-toward-you) grip about shoulder-width, arms fully extended, shoulder blades relaxed, legs quiet
End
body pulled up until the chin clears the bar, elbows fully flexed toward the ribs, shoulder blades depressed and retracted, ribs down
Range of Motion
full elbow flexion with shoulder extension/adduction from dead hang to chin-over-bar, then controlled return to full extension

How to Perform

Hang from a bar with a supinated (palms-facing-you) grip about shoulder-width apart, arms fully extended. Initiate by drawing the shoulder blades down and back, then pull the elbows toward the ribs until the chin clears the bar, keeping the ribcage down and legs quiet. Lower under control back to a full hang with elbows straight.

Watch on YouTube↗

Opens a YouTube search for “Chin-Up”

Equipment:pull up barresistance band (optional, for assistance)dip belt or dumbbell (optional, for loading)
Starting position: hanging

Coaching Cues

  1. 1

    Grip the bar palms facing you, hands about shoulder-width, and start from a full dead hang with elbows straight.

    (setup)
  2. 2

    Before the elbows bend, pull the shoulder blades down and back — as if putting them in your back pockets.

    (initiation)
  3. 3

    Pull the bar down to your collarbones rather than thinking about lifting yourself up.

    (external-focus)
  4. 4

    Keep ribs down and glutes lightly squeezed so the body rises as one unit without swinging or arching.

    (trunk-control)

Evidence-Based Dosing & EMG Data

Recommended Dosing

General resistance-training guidelines (not chin-up-specific trials): 2-4 sets, 2-3 sessions/week; for strength work near max effort with full recovery, for hypertrophy 6-12 quality reps or assisted variations taken close to fatigue. Progress via assistance reduction, added load, or tempo.

EMG Activation Data

Surface EMG studies comparing supinated chin-ups to pronated pull-ups consistently show very high latissimus dorsi activation in both variants, with the chin-up producing greater biceps brachii and pectoralis major activity, while the pronated pull-up tends to show somewhat greater lower trapezius activity. Infraspinatus and erector spinae are also substantially active. Peak lat activity occurs through the mid-range of the pull; the dead-hang position loads the lat at long muscle length under full bodyweight distraction. These are small-sample EMG comparisons in healthy adults, so between-variant differences should be treated as tendencies rather than fixed ratios.

Muscles Involved (18)

Primary Movers

Latissimus Dorsi— Main shoulder extensor/adductor pulling the humerus down from overhead; maximally lengthened at the dead hang.
Biceps Brachii— Supinated grip places biceps in a mechanically advantaged position; activation is higher in chin-ups than pronated-grip pull-ups, making it a co-prime mover.

Secondary Movers

Brachialis— Elbow flexor active regardless of forearm position.
Brachioradialis— Assists elbow flexion; contribution is smaller with a fully supinated grip.
Teres Major— Assists the latissimus in shoulder extension and adduction.
Posterior Deltoid— Assists shoulder extension, especially through mid-range.

Stabilizers

External Oblique— Anti-extension and anti-swing trunk control in the hang.
Triceps Brachii— Long head co-contracts to stabilize the glenohumeral joint and control the descent; it does not drive the movement since the net elbow action is flexion.
Flexor Digitorum Superficialis— Sustained isometric grip on the bar.
Rectus Abdominis— Prevents excessive lumbar extension and leg swing; keeps ribs down.
Middle Trapezius— Stabilizes the scapula against protraction as the chest approaches the bar.
Rhomboid Major— Assists scapular retraction and downward-rotation control.
Infraspinatus— Rotator cuff centering of the humeral head under distraction load.
Teres Minor— Rotator cuff centering of the humeral head.
Subscapularis— Anterior cuff stability of the glenohumeral joint during the pull.
Flexor Digitorum Profundus— Sustained isometric grip on the bar.

Synergists & Assistors

Lower TrapeziusSynergist— Drives scapular depression during the pull and controls the scapula on the descent.
Pectoralis MajorSynergist— Sternal fibers assist shoulder extension/adduction from the flexed position; more active in the supinated chin-up than the pull-up.

Easier Variations ↓

1

Band-Assisted Chin-Up

Loop a resistance band over the bar and place a knee or foot in it to offload bodyweight while keeping the full movement pattern; reduce band thickness as strength improves.

2

Eccentric-Only Chin-Up

Jump or step to the top position (chin over bar) and lower as slowly as possible (3-5 seconds) to full elbow extension; the inverted row is another useful horizontal-pull precursor.

Harder Variations ↑

1

Weighted Chin-Up

Add external load with a dip belt or a dumbbell between the feet/knees once 8-10 strict bodyweight reps are achieved, progressing load gradually.

2

Tempo/Pause Chin-Up

Add a 2-3 second pause with chin over the bar and a controlled 3-5 second lowering phase to increase time under tension and end-range control; L-sit chin-ups add a trunk-flexion demand.

Target Movements (7)

Elbow FlexionHumeroulnar Joint
Shoulder ExtensionGlenohumeral Joint
Shoulder AdductionGlenohumeral Joint
Scapular DepressionScapulothoracic Articulation
Scapular Downward RotationScapulothoracic Articulation
Scapular RetractionScapulothoracic Articulation
Finger Flexion (MCP)Metacarpophalangeal Joints

Why This Exercise Matters

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

Pulling (Doors, Drawers)essentialCarrying and Lifting Objects

Goals This Helps With

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

Improve Your Pull-UpperformanceImprove Grip Strengthperformance

Research Notes

claude-researched 2026-07; muscle/movement links validated against the roster. Adversarial clinical verification pending — do not promote past needs_review without human review.