Cable Internal Rotation

Move · Resistance Training · Movement, Typed Supps

Subscapularis is the largest muscle of the rotator cuff and the only one this movement trains directly.

Stage by stage

Set-up (Elbow at 90, tucked in): Keeping the humerus adducted confines the movement to rotation rather than to the chest and lat.
During the set (Subscapularis biased): Low-load isolated rotation favours the cuff's anterior stabiliser over the large internal rotators.
Immediately after (Light loads by design): The cuff muscles are small; heavier loads simply recruit pectoralis and latissimus to do the job instead.
Weeks later (Rotation ratio balances): Clinicians track the external-to-internal ratio rather than either value alone, and both sides need training.

Muscles trained

Primary: rotator cuff
Secondary: chest

Intensity

3.5 METs (Resistance (weight) training, multiple exercises, 8-15 repetitions at varied resistance).

Time to effect

Weeks: Small strength and control gains show up quickly, as with most rotator cuff isolation work, since the muscles involved are small and respond fast to direct loading.
Months: Balanced internal and external rotation strength tends to support healthier shoulder mechanics under heavier pressing work over time.

Common myth

"Rotator cuff training only means external rotation." In reality: Most rotator cuff programs emphasize external rotation because it is chronically weaker relative to internal rotation in people who do a lot of pressing — but neglecting internal rotation entirely leaves the shoulder unbalanced.