Chin-ups

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Historical reference: its only source is the original reference manual, and some of it may be out of date. Not used for AI answers until re-sourced.

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backlatscompoundbodyweightupper-body

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Exercise demo

In one line

Body-weight pull-up working the latissimus dorsi; grip orientation shifts the emphasis between upper and lower lats.

Detail

Chin-ups train the latissimus dorsi. Grip variations:

Supinated Grip — Primary: Latissimus Dorsi (MEO lower lats); Secondary: Biceps Brachii, Brachialis, Brachioradialis.
Pronated Grip — Primary: Latissimus Dorsi (MEO upper lats); Secondary: same.

Listed as an intermediate lat selection (Chin-ups / Assist). Chin-up is the "midrange" lat position in the Positions-of-Flexion chart (with lat pulldown).

Key facts

Primary: Latissimus Dorsi; Secondary: Biceps Brachii, Brachialis, Brachioradialis.
Supinated grip → lower lats; pronated grip → upper lats.

Connections

Latissimus Dorsi — primary mover.
Biceps Brachii / Brachialis / Brachioradialis — secondary.
Adduction — the key joint action.
Lat Pulldown — the machine equivalent.

Sources

Historical reference · reference manual (page cited)

p.180p.596p.672

Cited authorities in source: none specified for this entry.

Exercise guides

Chin-Up

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